The U.S. government's latest report on the mysterious disappearance of honeybees points to a parasitic mite as the biggest factor behind colony collapse disorder — and downplays the role of controversial pesticides that European officials are planning to ban.

Thursday's report from the Environmental Protection Agency and the U.S. Department of Agriculture says there should be further research into the effects of those nerve-agent pesticides, known as neonicotinoids. But it says the studies so far have not shown it to be the biggest hazard facing the bees.

Last month, beekeepers and environmentalists filed a federal lawsuit calling for an immediate ban on two kinds of neonicotinoids — clothianidin and thiamethoxam. One of the attorneys bringing that suit, Peter Jenkins of the Washington-based Center for Food Safety, told NBC News that his group was "very disturbed" by the way the report was presented, but he also said some of the problems cited in the report supported his case.

'Complex problem'
The report says that a complex combination of causes is behind colony collapse disorder, or CCD, a term that applies to the difficult-to-explain losses that have hit U.S. honeybee colonies since 2006. In the worst cases, entire colonies have disappeared within a few weeks. That's a big problem, because the government says an estimated one-third of all food and beverages are made possible by pollination, mainly by honeybees. Pollination is said to be worth more than $20 billion in agricultural production annually.

The relatively light bee colony losses during the winter of 2011-2012 gave some experts reason to hope that the CCD situation was getting better, but experts say that last winter's losses look as if they were worse than ever.

"The decline in honeybee health is a complex problem caused by a combination of stressors, and at EPA we are committed to continuing our work with USDA, researchers, beekeepers, growers and the public to address this challenge," acting EPA Administrator Bob Perciasepe said in a statement.

Deputy Agriculture Secretary Kathleen Merrigan promised that "key stakeholders will be engaged in addressing this challenge."

Scott Bauer / USDA via AP

A worker bee carries a Varroa mite, visible in this close-up view.

The report draws upon a gathering of officials and stakeholders that took place in Alexandria, Va., last October. It says that the parasitic Varroa mite is the "major factor" behind CCD in the United States and other countries. Varroa mites latch onto the bees and feed on their fluids, weakening the insects. The mites have developed widespread resistance to the chemicals that have been used to control them. The report says more attention should be given to breeding bees that can weather the mites, and notes that gene-sequencing projects focusing on honeybees as well as Varroa mites may provide fresh insights.

Beekeepers have long known about the mite problem, as well as the other causes listed in the EPA-USDA report: poor nutrition, reduced genetic diversity, the Nosema gut parasite, emerging viruses and a bacterial disease called European foulbrood. But figuring out the role played by pesticides has posed the biggest challenge for researchers as well as policymakers.

What to do?
Recent research studies have focused on the effect of neonicotinoids, a neurotoxic type of pesticide that has become widely used because they have little effect on mammals. Most of the studies suggest that the pesticides can scramble a bee's brains — but at what level of exposure?

Some say the exposure levels used in those studies may not accurately reflect the levels that bees experience in the fields. That's the tack taken in Thursday's report: "The most pressing pesticide research questions lie in determining the actual field-relevant pesticide exposure bees receive, and the effects of pervasive exposure to multiple pesticides on bee health and productivity of whole honeybee colonies," it said.

The report says residues from a different class of pesticides, known as pyrethroids, could pose three times as much risk to bees as neonicotinoids.  

The Center for Food Safety's Peter Jenkins complained that the effects of neonicotinoids were being downplayed, but he also called attention to some of the shortcomings mentioned in the federal agencies' report. "They admitted that their labeling is inadequate," Jenkins said. "They admitted that past risk assessments and data requirements were inadequate."

He said some of the proposed policy changes — including, for instance, the introduction of better equipment for coating seed corn with pesticides — would have a positive impact. "What they don't say is that it's going to take years and years to achieve those changes," Jenkins said.

Jenkins called for an immediate tightening of regulations of pesticides. "The one factor that EPA actually has control over is the one that they refuse to regulate," he said.

The EPA is working on a new round of risk assessments for pesticides, but the results of those assessments have not yet been released. Meanwhile, the agency is due to file its response to the environmentalists' lawsuit later this month. Jenkins said Thursday's report would have "no real effect" on the legal action, which could go on for years.

More about the bee die-off:

• Rise in bee deaths stirs up a buzz
• Neonicotinoids tied to crashing bee populations
• Mites and virus team up to wipe out beehives

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

Courtesy of Brian Switek

Dinosaur enthusiast Brian Switek surveys Utah's landscape during a road trip — and surveys the state of dinosaur lore in "My Beloved Brontosaurus."

When it comes to dinosaurs and other prehistoric monsters, even the experts can get things wrong — as dino-fanatic Brian Switek explains in his tour guide to the paleontological frontier.

The righting of wrongness begins with the title of Switek's book: "My Beloved Brontosaurus: On the Road With Old Bones, New Science and Our Favorite Dinosaurs." As most 9-year-olds could probably tell you, there's officially no such thing as a Brontosaurus. That name for the quintessential long-tailed, long-necked sauropod went out of fashion when scientists figured out that the Jurassic giant had already been dubbed Apatosaurus.

Nevertheless, the brontosaur serves as a totem for Switek, a prolific science writer whose work has appeared in Wired, Smithsonian, Slate, Scientific American and now most frequently on National Geographic's Phenomena blog network (as Laelaps). His earlier book, "Written in Stone," laid out the broad sweep of stories told by the fossil record — and in "My Beloved Brontosaurus," he focuses in on the what, where and when of the dinosaurs' heyday in the Mesozoic Era.

As you page through the book, you'll learn that not all dinosaurs have gone extinct. (Birds are dinosaurs.) You'll find out that the dinosaurs didn't start out as the rulers of the reptiles. (Crocodilians came first.) You'll delve into the back-and-forth debates that have occupied paleontologists for decades. (Was T. rex a hunter or a scavenger? Almost certainly both.) And you'll also get some great tips for future road trips in the American West.

Misconceptions and marvels
Switek talked about dinosaurs and tour directions during an interview last week. Here's an edited version of the Q&A that will whet your appetite for "My Beloved Brontosaurus":

Q: So many myths about dinosaurs are exploded in your book, but is there one big misconception that you want to set people straight about?

A: There’s one misconception that has a flip side to it, and that’s that dinosaurs are totally extinct. Birds are living dinosaurs. We figured that out about 20 years ago. So whenever we talk about the age of dinosaurs millions of years ago, and how all the dinosaurs are gone, that’s demonstrably not true. At least one lineage is still with us today.

The flip side of that is that dinosaurs became dominant as soon as they appeared — that the dawn of the dinosaurs sparked an immediate rise to ascendancy. The fact is that dinosaurs started out relatively small. They were relatively marginal. They really weren’t all that important until the extinction at the end of the Triassic period, about 200 million years ago, wiped away all the weird crocodile relatives that were the dominant land animals at the time. So the dinosaurian reign was made possible by, and then winnowed back by, extinction. It’s these wonderful extinction bookends that explain not only their origin, but their ultimate destination, bringing us to the birds that live today.

Q: Another issue is the appeal of dinosaurs: For some kids, dino-mania is almost a rite of passage. I love the idea that the book jacket for “My Beloved Brontosaurus” is also a fold-out dinosaur poster — what dinosaur fan wouldn’t love that? What is it about dinosaurs that makes them so appealing, particularly to kids?

A: I think they’re appealing because they demand answers of us. People have been wondering about dinosaurs, pondering what they were and what they were like, even before there was a name for them. I don’t just mean European naturalists. I mean Native Americans, people in ancient Greece and Rome, people in ancient China and India. People in all those cultures found dinosaur bones. They knew that these were the remains of once-living animals, and they created stories of monsters and heroes, myths and legends about creatures from distant times. So we were wondering about the dinosaurs before we even knew what they were.

That continues now, because there’s nothing quite like the dinosaurs. Yes, birds are living dinosaurs – but there’s so much more. There’s nothing like Apatosaurus, or Triceratops, or Tyrannosaurus rex around right now. When you look at their bones, questions immediately come to mind: What did they look like? What did they sound like? How quickly did they move? What did their environment look like? To me, it’s impossible to hear the dinosaur story without wondering about these questions.

Answering these questions puts our own existence in context. You can say all this happened 66 million years ago – but wait a second: What was America like back then? How did it all change? That brings up some very powerful truths about extinction, evolution and survival.  It’s these clues from our own distant past and our planet’s distant past that act as milestones by which we can understand our own existence.

J. Brougham / AMNH file

Experts say Tyrannosaurus rex may have had a downy layer of feathers, and probably had a coloration that was more varied than the stereotypical green.

Q: Another way that the book could be read is as a travelogue. It’s almost structured as a series of road trips that you’ve taken to explore all these fantastic fossils. And in fact, that’s what you’re doing along with your book tour. If there’s one dream trip that dinosaur fanatics should take, where would you tell them to go?

A: This is sort of a plug for my home state of Utah: There’s a byway system called the Dinosaur Diamond that runs through a good part of the state and includes the Dinosaur National Monument, where 150 million-year-old fossils are preserved in place; and the Cleveland-Lloyd Dinosaur Quarry, a place where over 46 individual allosaurs and other dinosaurs have been found. You can head up to Salt Lake City, where the Natural History Museum of Utah opened this last year. As you drive along those highways, there are various dinosaur trackways, lots of attractions, lots of dinosaur celebrities. So if anyone’s looking for a weeklong trip in the American West, that’s the best pre-planned tour there is for a dino fan.

Q: in terms of the frontiers for dinosaur research, there’s been talk about Jack Horner’s "Chickenosaurus" project, and there are always new perspectives on how dinosaurs lived and died. What do you see as the next big thing for dinosaur research?

A: Researchers are finding ways to draw out clues about how dinosaurs actually lived, through new technologies that can be applied to a variety of animals. So we’re looking at the development of better CT scanning technology. Improved CT technology is helping paleontologists get down to a degree of resolution they’ve never had before — and they’re finding clues about bone structure to a degree that was just not possible before.

What’s really exciting to me is the study of dinosaur color. It’s a field that’s moving forward by comparing fossil feathers to modern ones. Paleontologists are starting to reconstruct what colors the dinosaurs actually were. They might be able to identify the evolutionary advantages of colors, degrees of coloration, and maybe some aspects of sexual dimorphism. Everything we’re learning about dinosaur biology is filling in the picture of how they lived in a much more meaningful way.

Q: You mentioned that dinosaurs are appealing to us in part because they tell us how extinction works, and how our own distant past might have unfolded. That suggests that the study of dinosaurs can hold lessons for the 21st century. How can the dinosaur experience best be applied to our own human experience?

A: Dinosaurs shaped our evolution. People often say that the rise of mammals was made possible by the disappearance of all those non-avian dinosaurs. That's true, but it's not just that. Mammals lived alongside the dinosaurs — things like Stegosaurus and Allosaurus and Tyrannosaurus. By keeping our furry little ancestors in the shadows, the dinosaurs set the stage for the later evolution of primates.

Yes, those dinosaurs disappeared. But beyond that, we know that we’re changing the global climate in drastic ways. We know we’re distributing invasive species around the world. By looking back at the fossil record, and seeing how dinosaurs reacted to drastic changes, we can begin to outline how organisms today and in the future are going to react to the same sorts of changes. Dinosaurs might hold clues about our future. The past isn't just a static monument to what once was. The fossil record also carries lessons about what will be. 

For much, much more about dinosaur wrongness and rightness, check out the latest 'Virtually Speaking Science' podcast with Switek and University of Maryland paleontologist Tom Holtz. You can download a variety of VSS podcasts from BlogTalkRadio or iTunes.

More 'Virtually Speaking Science' podcasts:

• George Djorgovski on the Internet and education
• Doug Griffith and Taber MacCallum on moon and Mars trips
• Sean Carroll and Matt Strassler on physics' X Files
• Ig Nobel's Marc Abrahams on weird science in 2012
• Paul Doherty on Curiosity and the year in science
• Shawn Lawrence Otto on climate change and the 2012 election
• Sean Carroll on what lies beyond the Higgs boson
• Alan Stern on the Uwingu mystery space venture
• George Djorgovski on the future of immersive virtual reality
• JPL's Dave Beaty previews Curiosity's mission on Mars
• SETI Institute's Seth Shostak about aliens and UFOs
• Paul Doherty on solar eclipses and the transit of Venus
• Veronica Ann Zabala-Aliberto on spaceflight and Yuri's Night
• JPL's Dave Beaty on the search for life on Mars
• Shawn Lawrence Otto on science and politics
• Ig Nobel impresario Marc Abrahams on silly science in 2011
• Rocket scientist Robert Zubrin on Mars exploration
• Propulsion expert Marc Millis on interstellar spaceflight
• Sean Carroll on the puzzles facing physicists
• Rand Simberg on the private-enterprise vision for spaceflight
• Martin Hoffert on the future of energy policy
• George Djorgovski on science in virtual worlds
• Alan Stern on suborbital research and NASA's mission to Pluto
• Col. 'Coyote' Smith on the outlook for space solar power
• Tim Pickens on rocket ventures and the Google Lunar X Prize

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

This story was originally published on Wed May 1, 2013 4:50 PM EDT

Experts have provided the grisly goods to back up 17th-century accounts of cannibalism during the Jamestown colony's "starving time" — including a skull that shows signs of being chopped at and pried apart.

"Our team has discovered partial human remains before, but the location of the discovery, visible damage to the skull and marks on the bones immediately made us realize this finding was unusual," Bill Kelso, chief archaeologist of the Jamestown Rediscovery Project in Virginia, said in a news release issued Wednesday. Specimens from the Jamestown site were laid out during a Washington news conference.

Written accounts described acts of cannibalism during the winter of 1609-1610, when sickness, starvation and attacks from native tribes in the area put the two-year-old Virginia settlement to its sternest test. Scores of the colonists who crowded inside James Fort died that winter. One of the accounts described a husband who killed his pregnant wife and salted her flesh for storage and consumption. (The husband was executed for the crime.)

There was no reason to doubt the accounts, but in the course of their decades-long excavation, archaeologists were on the lookout for remains that might tell more of the story behind Jamestown's hardships. They found the evidence in the form of a partial human skull and other bones lying in a 17th-century trash deposit. Kelso enlisted the Smithsonian Institution's National Museum of Natural History to sort out the clues. Colonial Williamsburg and Preservation Virginia helped provide historical context.

'Jane of Jamestown'
Based on an analysis of the bones — including the skull and its teeth, as well as the size of a tibia and bone growth in a knee joint — experts determined that the remains came from a 14-year-old female, nicknamed "Jane." The isotopic distribution of elements in the bones suggested that she consumed a European diet of wheat and meat.

Carolyn Kaster / AP

Doug Owsley, division head for physical anthropology at the Smithsonian's National Museum of Natural History, displays the skull and a facial reconstruction for "Jane of Jamestown" during a news conference at the museum in Washington on Wednesday.

Carolyn Kaster / AP

Strike marks are seen on the skull of "Jane of Jamestown" at the National Museum of Natural History.

The grisliest findings were reflected in the wounds to the head: The chief of the museum's division of physical anthropology, Douglas Owsley, identified chops to the forehead and the back of the cranium to open the head. Knife cuts on the jaw and the cheekbone could have been made during removal of the flesh. Other markings suggest that the head's left side was punctured and pried apart.

The scientists' conclusion: Jane was butchered for her meat.

"She was almost certainly dead when she was cannibalized," Jim Horn, Colonial Williamsburg's vice president of research and historical interpretation, told NBC News. "The way the cuts are configured on the skull points to the fact that she was dead. if she was not, there would have been more signs of a struggle, and the marks would have been more irregular."

Based on the bone analysis and the disposition of the remains at the site, researchers believe Jane arrived in Jamestown in August 1609, just months before the crisis. She might have been a maidservant, or the daughter of a colonist. Chances are that she died in January or February of 1610, from either sickness or starvation, Horn said.

"The 'starving time' was brought about by a trifecta of disasters: disease, a serious shortage of provisions, and a full-scale siege by the Powhatans that cut off Jamestown from outside relief," he said in Wednesday's news release. "Survival cannibalism was a last resort; a desperate means of prolonging life at a time when the settlement teetered on the brink of extinction."

When Lord De La Warr and his relief party arrived in Jamestown in the spring of 1610, he ordered the "cleansing" of the ruined settlement. "It must have looked like a charnel house when he arrived," Horn said. That's probably how Jane's remains came to be deposited amid a trash heap in an abandoned cellar, he said.

Jane's legacy
Jamestown went on to become the Virginia Colony's capital from 1619 to 1699. In the late 17th century, the settlement was devastated by a series of fires. At the dawn of the 18th century, Virginia's capital was moved to Williamsburg, and old Jamestown faded away. Decades later, the descendants of Jamestown's settlers played their part in the creation of the United States of America.

Researchers have not matched up Jane's bones with a specific member of the Jamestown colony, and although DNA samples have been saved for future analysis, they say there's little hope of identifying modern relatives for comparative genetic testing. But the excavation continues, and Jane's remains provide graphic evidence of Jamestown's desperation.

Horn acknowledges that the story of Jane has a grisly fascination to it, but he says there's a broader significance as well. "It revolves around what it took to successfully establish European colonies in the New World," he told NBC News. "In the early phase of European colonization of the Americas, most colonies actually failed. They failed for the kinds of reasons that we discovered at Jamestown. ... Most colonies lasted no more than six to 12 months. What we're looking in the case of Jamestown is a remarkable story of survival and endurance."

More about Jamestown:

• 400-year-old seeds found in Jamestown
• 'New World' shows off a new Jamestown
• Colonial armor found in Jamestown pit

An exhibition that tells the story of Jane and the survival of Jamestown, England's first permanent settlement in America, is due to open May 3 at Historic Jamestowne in Virginia. Jane's bones will be put on exhibit temporarily, and eventually they will be "respectfully reinterred," Horn said. The facility has also produced a book and DVD on the subject, titled "Jane." However, details of the discovery have not yet been published in a peer-reviewed scientific journal.

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

Droplets of condensation may make a cold can of beer look more appealing on a hot day, but they're also making that frosty brew warm up faster. So here's some news you can use: If it's hot and humid, put a cover over your can of cold beverage. And if you want to warm up a frozen can quickly, don't bake it. Steam it.

That's exactly what University of Washington researchers did in a series of experiments to show how the warming power of condensation applies to issues ranging from colder beer to hotter climates.

The beer-can study, published in the April issue of Physics Today, began a couple of years ago when UW atmospheric scientist Dale Durran was looking for a way to explain how condensation produced heat as the flip side of evaporative cooling. The cooling effect is well-known — we feel it when sweat evaporates to cool us off in the summer time, or when we turn on a mist cooler. But the flip side of the effect is less widely understood.

Durran figured out that the condensation on a cold aluminum can might serve as a handy illustration. He did a quick back-of-the-napkin calculation, and found that the heat released by water just 100 microns (four thousandths of an inch) thick should heat its contents by 9 degrees Fahrenheit (5 degrees Celsius).

"I was surprised to think that such a tiny film of water would cause that much warming," Durran said in a UW news release.

He recruited a fellow atmospheric scientist at UW, Dargan Frierson, to conduct the initial experiment ... in Frierson's basement bathroom. First, they set a can of beverage on the toilet tank and warmed it up with a space heater. Then they took another can, turned on the shower and let the bathroom get nice and steamy. Each time they ran the experiment, the researchers stuck a thermometer through the can's pop-top opening and watched the temperature rise over the course of 15 minutes.

Mariusz Kaldon

Droplets of condensation on a chilly can are a signal that the temperature inside is rising.

Frierson said conditions got a little sticky in the steamed-up bathroom. "I think that's the most uncomfortable my research has ever made me — but it's all for science," he told NBC News.

Even though the air temperature was the same in both cases, the liquid in the steamed-up can warmed up twice as fast. The researchers followed up on the basement-bathroom findings with more rigorous lab experiments. Every time, the cans warmed up more quickly in more humid conditions.

The researchers even charted how quickly 12-ounce aluminum cans of chilled liquid should warm up, depending on different levels of temperature and humidity. For example, in five minutes, the can should get 6 degrees F (3 degrees C) warmer due to condensation amid New Orleans' typical summer conditions. The equivalent warm-up factor would be 3.5 degrees F (2 degrees C) in New York, and 2 degrees F (1 degree C) in Seattle. But in Dhahran, a Saudi city that ranks among the hottest, stickiest places in the world, the can would get about 14 degrees F (8 degrees C) warmer in five minutes.

That's why covering a cold can is a such a good idea on a steamy-hot summer day. "Probably the most important thing a beer koozie does is not simply insulate the can, but keep condensation from forming on the outside of it," Durran said.

The effects of condensation and evaporation are well-known to climatologists, but Durran and Frierson say the beer-can experiments can give the general public a better understanding of atmospheric dynamics.

"Condensation as a heat source is just tremendously important," Frierson said. "It's really like the gasoline that powers hurricanes, thunderstorms and tornadoes."

Some climate models suggest that there could be 25 percent more humidity in the atmosphere by the end of the 21st century, and that could lead to more bouts of extreme weather in the decades to come.

"We want people to appreciate how powerful this effect is," Durran told NBC News. "A very thin film around the can makes a big difference in the temperature of its contents, and that just makes you appreciate the importance of that same heating effect in our atmosphere."

Here's how to run the experiment described in the YouTube video from University of Washington Department of Atmospheric Sciences Outreach:

1. Freeze two cans of your favorite beverage. This should take roughly seven hours, depending on your freezer.
2. Fifteen minutes before taking out the cans, preheat oven to 250 degrees F and start boiling water in a pot. Place a cookie rack on top of pot.
3. Take the cans out of freezer. Place one in the preheated oven. and one over the boiling pot. 
4. Start timer for 10 minutes. 
5. After 10 minutes, carefully remove cans from oven and pot.
6. Crack open both cans and pour into separate glasses.
7. Take a photo/video of the two cans and glasses, go to the UW YouTube page, and post a video response.

More beer-can science:

• Tiny sip of beer can produce burst of pleasure
• Study explains the science of a beer buzz
• Scientists study how beer goes bad

Update for 9:30 p.m. ET April 26: Would wiping off the drops of condensation keep your drink cooler? Sorry, says UW spokeswoman Hannah Hickey. "That will only make your drink even warmer," she writes in a Twitter update.

Update for 2:25 p.m. ET April 27: Some commenters are wondering why there's so much fuss over a relatively simple concept. The point of the exercise wasn't really to break new ground in atmospheric physics (or in summertime beverage consumption), but "to improve our intuition about the power of condensational heating" — which is a huge factor in climate dynamics. Durran explained further in a comment below, and I'm providing an extended version of his comments here to give them a little more visibility:

"In my class, students definitely need to know how condensation causes heating. Here's how. There are bonds that link water molecules together into a crystal lattice to form ice. It takes heat (energy) to break a few of those bonds and turn ice to liquid water. To evaporate the liquid water, the rest of the bonds between molecules need to be broken, which takes a lot more heat. Once all the bonds are broken, the liquid is converted to water vapor, an invisible gas.

"This processes reverses when water vapor is cooled enough to condense as liquid water. Bonds between molecules re-form, and the heat it took to originally break them is released into the surroundings.

"The reason we make a big deal about the power of condensational heating is that it does amazing things in the atmosphere, such as powering the updrafts in thunderstorms. The rising cloud-filled updrafts in the video linked below ascend like hot-air balloons because they are warmed, not by burning a fuel like propane, but by the heat released as water vapor condenses.

"Here's the video link: http://www.youtube.com/watch?v=GVIwDoogncQ

"Such a visualization might help people understand some of the applications. (Only the last half of the Physics Today article was about the beer can heating.)"

Durran and Frierson are the authors of "Condensation, Atmospheric Motion, and Cold Beer" in Physics Today. Supplemental experiments are described in "An Experiment Uses Cold Beverages to Demonstrate the Warming Power of Latent Heat." Lab experiments were performed by Stella Choi and Steven Brey. Galen Richards and Jaycyl Golding, high school students serving as Pacific Science Center Discovery Corps interns, worked on earlier versions of the experiments. Instrument makers Allen Hart and Steven Domonkos built experimental apparatuses. Funding was provided by National Science Foundation grants AGS-0846641 and AGS-1138977.

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

Takeshi Inomata

Workers stand on Platform A-24 at the Ceibal archaeological site in Guatemala. Archaeologists say the dig revealed the oldest monumental construction in the Maya lowlands.

Archaeologists say that ceremonial structures unearthed in Guatemala are centuries older than they expected — and that the findings point to new theories for the rise of Maya culture.

"The origin of Maya civilization was more complex than previously thought," the University of Arizona's Takeshi Inomata, lead researcher for a study appearing in this week's issue of the journal Science, told reporters on Thursday. Even though all this happened 3,000 years ago, the findings could provide fresh insights about social change in general, he said.

The Maya had their heyday in Mexico and Central America between the year 250 and 900, but the roots of their culture go much farther back. There are several schools of thought about how their distinctive culture arose: Some archaeologists say the central features of Maya cultural life, including grand ceremonies centered on broad plazas and pyramids, were borrowed from Mexico's older Olmec civilization. Others say those features arose internally, without much outside influence.

Inomata said the excavations at Ceibal, in Guatemala's Maya lowlands, suggest a more complicated scenario. Over the course of seven years, he and his colleagues dug down more than 50 feet, analyzed the layers of sediment, and did scores of radiocarbon-dating tests to trace the evolution of Ceibal's structures. They concluded that Ceibal's Maya rulers started building ceremonial plazas and platforms around 1000 B.C., and had turned those structures into a central pyramid and plaza by 800 B.C. 

That would mean Ceibal's residents were developing the architectural and religious hallmarks of Maya society before the first appearance of those hallmarks in Olmec society, at La Venta, hundreds of miles away on Mexico's Gulf Coast. La Venta's ceremonial structures have been dated to about 800 B.C.

Science / AAAS

Ceibal lies in Guatemala's Maya lowlands. The Olmec centers of San Lorenzo and La Venta were hundreds of miles away, in Mexico. Researchers say Ceibal also was influenced by other communities in central Chiapas and along the Pacific coast.

Other Maya settlements were building such structures around that same time, although they weren't as developed as Ceibal's. A wide spectrum of Mesoamerican communities — for example, settlements in central Chiapas and those on the southern Pacific coast — may have had a lot of important interactions with Ceibal and other communities in the Maya lowland during this period, Inomata said.

He stressed that the Olmec almost certainly influenced Maya culture during the centuries that predated Ceibal's rise. For example, there's evidence that an Olmec center near San Lorenzo was dominant well before Ceibal's residents began building their ritual structurs. However, Inomata said, "San Lorenzo didn't have the kind of ceremonial complexes that we're talking about."

The period from 1000 and 800 B.C. appears to have been a key turning point for Maya culture. There may have been a "power vacuum" between the fall of San Lorenzo and the rise of La Venta that gave early Maya communities the opportunity to experiment and develop cultural innovations, Inomata said. "We are looking at major change in this period, and that happened really in the absence of a very strong Olmec center," he told reporters.

The construction of Ceibal's ceremonial complexes would have required the participation of the whole community, said the University of Arizona's Daniela Triadan, who is a co-author of the Science paper as well as Inomata's wife. "Some people might already have had a special position in the community, and they were most certainly people with specialized ritual knowledge. This indicates that the transition from a mobile hunter-gatherer and horticultural lifestyle to permanently settled agriculturalists was rapid," she said.

What drove that rapid change? The research team is still looking into potential environmental factors, but Inomata speculated that the cultivation of maize — that is, corn — may have been decisive. "There may have been a major increase in maize production, which may have been a threshold in terms of the development of cultural elements," he said.

"This is not just a study about this specific civilization," Inomata told reporters. "We also want to think about how human societies change, and how human civilization developed. What we are seeing here is that major renovation and change can happen through the interaction of various groups. It doesn't have to come from powerful, major political centers. That's one important implication that we are getting."

More about the Olmec and the Maya:

• Olmec influence stretched hundreds of miles
• Maya doom teaches climate lesson
• Cosmic Log archive on Maya culture

In addition to Inomata and Triadan, the authors of "Early Ceremonial Constructions at Ceibal, Guatemala, and the Origins of Lowland Maya Civilization" include Kazuo Aoyama, Victor Castillo and Hitoshi Yonenobu.

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

A diminutive robot helped researchers make a substantial discovery during preliminary tests conducted in a tunnel running under the Temple of Quetzalcoatl at the archaeological site of Teotihuacan, the team said Monday.

The team expected to find only one chamber in the last section of the tunnel — but instead, they found three, team leader Sergio Gomez said in a report published by the Mexican newspaper El Universal. The chambers are thought to have been used by Teotihuacan's rulers roughly 2,000 years ago for royal ceremonies or burials, but they're so choked with mud and rubble that they haven't been explored in modern times.

Henry Romero / Reuters

A worker from the National Institute of Anthropology and History walks next to a robot used to explore ruins at the entrance of a tunnel in the archaeological area of the Quetzalcoatl Temple, near the Pyramid of the Sun at the Teotihuacan archaeological site.

That's where the 3-foot-long (1-meter-long) robot known as Tlaloc II-TC comes in: The robot is designed to drive through the tight spaces leading to the back of the tunnel beneath the Temple of Quetzalcoatl, also known as the Temple of the Feathered Serpent. It's equipped with a video camera as well as mechanical arms to clear obstacles.

The current project follows up on an earlier round of robotic exploration by Tlaloc II-TC's predecessor, Tlaloc I, in 2010. (Tlaloc was the Aztec god of rain.)

In 2010, Gomez said there was a "high possibility that in this place, in the central chamber, we can find the remains of those who ruled Teotihuacan." The city was once an influential center of Mesoamerican culture, but little is known about its rulers. Archaeologists have not yet found any depictions of a ruler, or any tomb of a monarch.

El Universal quoted Gomez as saying that the configuration of the space beneath the temple appears to be similar to that of the tunnel running beneath Teotihuacan's Pyramid of the Sun, where four chambers were explored in the 1970s. About 76 meters (250 feet) of the Quetzalcoatl tunnel have already been uncovered, leaving 30 meters (100 feet) or so in the last section. After a round of robotic reconnaissance, archaeologists intend to clear out that section for exploration.

Henry Romero / Reuters

Visitors look on at the archaeological area of the Temple of Quetzalcoatl, near the Pyramid of the Sun at the Teotihuacan archaeological site, about 60 kilometesr (37 miles) north of Mexico City.

Henry Romero / Reuters

Archaeologist Sergio Gomez from the National Institute of Anthropology and History speaks to the media during a news conference in the archaeological area of the Temple of Quetzalcoatl on Monday. A remote-controlled robot has relayed back video images of what appears to be three ancient chambers beneath the temple.

More about Mexican archaeology:

• Google maps ancient Mexican ruins
• Ancient Mexico's dead were given makeovers
• All about Teotihuacan on NBCNews.com

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

The tale surrounding the discovery of King Richard III's skeleton beneath an English parking lot is about much more than a pile of 528-year-old bones — all you have to do is look at the face of Philippa Langley as she breaks down during an archaeological autopsy.

"I don't see bones on that table," she says, during an emotional scene in a new documentary about the king's remains. "I see the man."

Langley, a 50-year-old Scottish screenwriter, plays almost as big a role as the much-maligned monarch in "The King's Skeleton: Richard III Revealed." The show airs Sunday night on the Smithsonian Channel in the U.S., after racking up royal ratings on British TV. It was Langley who enlisted the Richard III Society to help jump-start the excavation, and she serves as the on-screen witness for many of the key twists in the excavation.

Medieval CSI
Based on an analysis of the historical records, archaeologists from the University of Leicester obtained a license from the British government to dig into that parking lot next to Leicester Cathedral last year. "The King's Skeleton" traces each step in the CSI-style investigation, leading to February's conclusion that the bones were indeed the mortal remains of the last Plantagenet king.

Richard III reigned for only two years, but his death in the Battle of Bosworth Field in 1485 was a key moment. In fact, many historians consider his fall to mark the end of the Middle Ages in England. A century later, William Shakespeare's play immortalized him as one of literature's greatest villains.

One of the themes of "The King's Skeleton" centers on how Richard III may have gained a blacker reputation than he deserved. The way Richard III's fans see it, the successors to the throne from the House of Tudor had an interest in making their Plantagenet forebears look bad — to the point of portraying Richard III as a misshapen hunchback. "This is propaganda," historian Pamela Tudor-Craig says during the documentary.

So the truth comes as a shock to Langley.

"What we're actually seeing here is that this skeleton in fact has a hunchback," Jo Appleby, a bone expert at the University of Leicester, tells her in one scene.

"No!" Langley answers.

The identification of Richard III's remains drew upon carbon dating and detailed studies of the skeleton, including evidence of wounds that matched up with historical accounts of the king's demise. But the weightiest evidence comes from analysis of DNA extracted from the skeleton: The chemical signature of the mitochondrial DNA matched up with two maternal-line descendants of Richard III's eldest sister, Anne of York.

Stay tuned
Does this mean the case of Richard III is closed? Not yet. Mitochondrial DNA is not as precise an indicator as, say, a paternity test. "The DNA evidence is simply a single strand within the entire analysis procedure," Turi King, the University of Leicester geneticist who conducted the analysis, told NBC News on Friday. "You certainly wouldn't convict somebody on [the basis of this] DNA evidence."

However, King noted that the mitochondrial DNA signature for this particular skeleton is shared by only a few percent of Europeans. "It's quite a rare type, so that adds to the weight of the evidence," she said.

The next step will be to analyze the skeleton's Y-chromosome DNA, which is passed down from father to son. The Y-chromosome signature is far more precise than mitochondrial DNA, which all children get from their mother. Four paternal-line descendants of Richard III's family have already been identified and tested, and King is now waiting to do the much more complicated reconstruction of the skeleton's Y-chromosome DNA signature.

Working on the royal remains has been a "dream project," King said, but not without its drawbacks: "It's been very stressful. You're trying to work quite quietly and calmly. The pressure to make sure everything has been done properly has been intense. ... I feel like I'm still in the middle of it."

The license to work with the skeleton runs out next year, and King will have to finish up her DNA studies by then.

Meanwhile, a potential legal battle is looming over whether the remains will be reburied in Leicester Cathedral, as planned, or in York instead. Thankfully, that's one drama King and the other scientists involved in the Richard III mystery won't have to deal with.

"I just try to tune it out," she said.

More about the Richard III saga:

• Parking-lot skeleton identified as Richard III
• Could Richard III have gotten his spine fixed?
• For some, resting place is human rights issue

To tune in "The King's Skeleton: Richard III Revealed," check your cable provider's TV listings or consult the Smithsonian Channel's website. Britain's Channel 4 aired the show as "Richard III: The King in the Car Park."

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

Thermal-imaging devices have been used to seek out pot-growing operations, map Martian geology — and now, to watch the second suspect in this week's Boston Marathon bombings as he was holed up in his last hiding place.

Authorities said a helicopter equipped with a thermal imager spotted the heat signature of a person inside a tarp-covered boat, sitting in a backyard in Watertown, Mass. Police used the sensor after an area resident reported seeing a trail of blood leading to the boat — and catching a glimpse of a blood-covered body inside. The thermal readings confirmed that there was indeed someone under the tarp, and that the person was still alive.

"Our helicopter had actually detected the subject in the boat," Col. Timothy Alben of the Massachusetts State Police told reporters. "We have what's called a FLIR — a forward-looking infrared device — on that helicopter. It picked up the heat signature of the individual, even though he was underneath what appeared to be the 'shrink wrap' or cover on the boat itself. There was movement from that point on. The helicopter was able to direct the tactical teams over to that area."

There was an exchange of gunfire when a SWAT team approached the boat, so police had to back off. The helicopter continued to track the body's movements inside the boat. Eventually, the tactical team moved in and took the wounded bombing suspect, 19-year-old Dzhokhar Tsarnaev, into custody.

How thermal imaging works
Thermal imagers can spot the signature of a heat source inside a house, a vehicle, or in this case, a vessel. Walls may stop visible-light wavelengths, but the heat can still pass through. Variations in heat emissions can be picked up by camera chips designed to be sensitive to the infrared part of the spectrum. The signature would be particularly noticeable when there's a significant difference between the background temperature and the temperature of the heat source.

Police have long used such devices to find out whether marijuana was being grown inside a house using heat lamps. In 2001, the Supreme Court ruled that the use of thermal scans to monitor heat sources inside a person's home should be considered a "search" under the Fourth Amendment, and thus would require a warrant. The court said such scans could reveal private details about the homeowner, including the time of night when "the lady of the house takes her daily sauna and bath."

Thermal imagers have been taken to other worlds — for instance, aboard NASA's Mars Odyssey orbiter, which analyzes variations in the composition of the Red Planet's surface using the Thermal Emission Imaging System, or THEMIS.

Immigration authorities have used thermal scanners to look for the signs of fever among arriving passengers, and researchers have been experimenting with them as a lie-detector technique.

In 2009, FBI investigators used thermal imagers to search for graves in the neighborhood where Cleveland serial killer Anthony Sowell lived. That may well have been the most notorious case where the technology was brought to bear. Until now.

Update for 5:43 p.m. ET April 20: The comments on this story might suggest I've shed more heat than light on the role played by thermal imaging. There's no question about it: The crucial break in the case came when the boat owner, David Henneberry, saw the blood-covered body in the boat, called police and then got out of the way. Police used thermal imagery to track the suspect's movements inside the boat, and help guide the SWAT team's response.

In most cases, thermal imagers can detect only the heat signature emanating from a wall or a vehicle. For example, you could tell whether there were heat lamps (or a lady taking a bath) in a particular room by noticing the high level of heat emitted by the room's walls. But you generally wouldn't see the outline of the heat lamps themselves (or the lady, for that matter). In the Cleveland serial-killer case, thermal imaging was used to look for the signs of freshly turned soil rather than for the cold, dead bodies themselves.

The Watertown case is special: The tarp was so thin that police could indeed see Tsarnaev's outline, as graphically illustrated by these pictures.

More about thermal imaging:

• PhotoBlog: More thermal images of suspect
• Infrared holography identifies fire victims
• Like Pinocchio, your nose shows when you lie
• New tech gives soldiers Predator-style vision

Slideshow: Search for suspects in Boston Marathon bombings

Jared Wickerham / Getty Images

Cheers filled the streets after a Boston Marathon bombing suspect was captured alive but wounded Friday night — following a daylong manhunt that shut down the city.

Launch slideshow

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

This story was originally published on Fri Apr 19, 2013 9:14 PM EDT

Egypt SCA via AP

This hieroglyphic papyrus was among scores of ancient documents found at Wadi al-Jarf in Egypt.

Archaeologists have stumbled upon what is thought to be the most ancient harbor ever found in Egypt, along with the country's oldest collection of papyrus documents, Egyptian authorities say.

The harbor goes back 4,500 years, to the days of the Pharaoh Khufu (Cheops) in the Fourth Dynasty, the Egypt State Information Service reported on Friday. The Great Pyramid of Giza serves as the tomb of Khufu, who died around 2566 B.C.

The harbor was built on the Red Sea shore in the Wadi al-Jarf area, 112 miles (180 kilometers) south of Suez. The find was made by a French-Egyptian mission from the French Institute for Archaeological Studies, according to Friday's dispatch. Discovery News quoted the mission's director, Pierre Tallet of the University of Paris-Sorbonne, as saying that the site "predates by more than 1,000 years any other port structure known in the world." 

The harbor is considered one of the most important commercial ports of ancient Egypt, where trips to export copper and other minerals from the Sinai Peninsula were launched. Egyptian authorities said the archaeologists found a variety of docks, as well as a collection of carved stone anchors.

The team also unearthed a collection of 40 papyri that detailed the daily lives of ancient Egyptians during the 27th year of Khufu's reign, said Egypt's antiquities minister, Mohamed Ibrahim. "These are the oldest papyri ever found in Egypt," he said. Among the subjects reportedly covered were the arrangements for getting bread and beer to the workers heading out from the port.

One papyrus is said to detail the daily activities of an official named Merrer, who was involved in building the Great Pyramid.

"He mainly reported about his many trips to the Turah limestone quarry to fetch block for the building of the pyramid," Tallet told Discovery News. "Although we will not learn anything new about the construction of the Cheops monument, this diary provides for the first time an insight on this matter."

Egypt SCA via AP

Fragments of papyri from Wadi al-Jarf shed light on life in ancient Egypt.

More about Egyptian finds:

• Bones, jars found in 3,000-year-old tombs
• Egyptian temple holds ancient shoes
• Cosmic Log archive on Egypt

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

Reidar Hahn / Fermilab

The Cryogenic Dark Matter Search experiment, or CDMS, adds new intrigue to the subatomic hunt.

Three potential signatures of exotic dark matter particles have been found hidden in the readings from an underground lab in Minnesota  — and although the results are too tentative to be classified as a discovery, scientists say they provide promising new clues to the solution of a decades-old mystery.

"People shouldn't come away from this thinking that we've found dark matter," Rupak Mahapatra, a physicist at Texas A&M University who is a principal investigator with the SuperCDMS collaboration, told NBC News. "Really, it's just the beginning. ... What we really need to do is make more detectors and run them, and be sure."

If the results are confirmed, that would point to the existence of a weakly interacting massive particle, or WIMP, that could help account for the 27 percent of the universe that is thought to consist of dark matter. Such matter seems to be invisible and is detected primarily through its gravitational effect. Another mysterious quality known as dark energy accounts for 68 percent of the universe. That leaves just 5 percent consisting of ordinary matter — the stuff that makes up everything we see around us.

Physicists have puzzled over the nature of dark matter since the 1930s, and billions of dollars have been spent building experiments to track it down. 

Finding, or fluke?
The three high-energy events were recorded in 2008 by the Cryogenic Dark Matter Search, or CDMS, an experiment that was set up a decade ago nearly a half-mile (713 meters) underground in northern Minnesota's Soudan mine. That depth helps to shield the experiment from background cosmic rays that would overwhelm the signature of dark matter interactions at the surface.

The interactions seen by the CDMS team point to the existence of WIMPs with a best-guess mass of 8.6 billion electron volts, which would be about nine times as massive as the proton. Scientists calculated that there should be, on average, 0.7 events of that type recorded during the time frame for the readings.

NASA / CXC / CfA / STScI / Magellan / Univ. of Ariz. / ESO

X-ray observations of the Bullet Cluster provide some of the best evidence for the existence of dark matter. Click on the image to learn more.

It's possible that the three events are statistical flukes — analogous to, say, rolling three 7's in a row at a Vegas craps table. In this case, the scientists say there's a 99.8 percent chance that their results reflect a real phenomenon rather than a random crap shoot. That's significant, but it's not significant enough to claim a discovery. To make such a claim, the confidence level would have to go up to 99.9999 percent, or 5-sigma in math-geek speak.

"In medicine, you can say you are curing 99.8 percent of the cases, and that's OK. When you say you've made a fundamental discovery in high-energy physics, you can't be wrong," Mahapatra explained in a Texas A&M news release. "Given the money involved — $30 million in this case — it has to be extremely precise. With a 99.8 percent chance, that means if you repeated the same experiment a few hundred times, there is one chance it can go wrong. We want one out of a million instead."

Mahapatra said it took almost five years to notice the potential dark matter events because the CDMS team began their analysis by looking at the results from a set of germanium detectors, which are sensitive to higher masses. Another set of data was collected using silicon detectors, which are sensitive to lower masses, but those readings were put aside.

In the past few years, other dark-matter experiments began pointing to a mass range that was lower than scientists expected. "When they started seeing something significant, we thought we would look at our silicon data, which we were sitting on for more than four years," Mahapatra said.

'Hot on the trail'
Caltech theoretical physicist Sean M. Carroll agreed that it was too early to declare a discovery, but said "it would not be a surprise" if the CDMS data ended up being confirmed. Other experiments, ranging from AMS to LUX to SuperCDMS to Xenon1T, will be adding to the evidence. "It is certainly a reminder that we are hot on the trail of looking for dark matter," Carroll told NBC News.

He was intrigued by the possibility that the heavier particle mass could explain why dark matter accounts for so much more of the universe than ordinary matter. "You can imagine that there is one dark matter particle for every ordinary particle," Carroll said.

Some theorists propose that ordinary matter and dark matter come into existence through a process known as cosmic cladogenesis. Mahapatra said a balance in the number of the two types of particles would fit such a hypothesis. "It's either a coincidence, or a tremendous clue," Mahapatra said.

More about dark matter:

• Dark matter hints found on space station
• How to catch dark matter
• Why dark matter matters

The report from the CDMS Collaboration, "Dark Matter Search Results Using the Silicon Detectors of CDMS II," was discussed over the weekend at the American Physical Society's April meeting in Denver and has been submitted for publication in Physical Review Letters. Mahapatra is one of 89 listed co-authors.

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

Christie's

Biologist Francis Crick drew this sketch of DNA's molecular structure in a seven-page handwritten letter to his son that sold for more than $6 million on Wednesday. "The model looks much nicer than this," Crick wrote.

A 60-year-old letter in which biologist Francis Crick told his son about DNA's double-helix structure, weeks before the Nobel Prize-winning discovery was revealed to the world, sold at a New York auction on Wednesday for a record price of $6 million.

"I'm sort of in a state of shock," said Michael Crick, the son who received that letter in 1953 and held onto it for six decades. "The family is calling me 'The Six Million Dollar Man.'"

The $6,059,750 sale price represents the highest amount ever paid for a letter, said Elizabeth Van Bergen, a spokeswoman for the Christie's auction house. The total price includes the buyer's winning bid of $5.3 million plus the buyer's premium. That sum is roughly three times as much as the pre-sale estimates of the letter's worth ($1 million to $2 million) and more than four times as much as the current Nobel Prize amount ($1.25 million).

The letter was purchased by an anonymous buyer who made the bid over the phone. Half of the proceeds will go to Michael Crick and his wife. The other half will go to the Salk Institute for Biological Studies in California, where the elder Crick worked up until his death in 2004 at the age of 88.

Francis Crick and his American colleague, James Watson, published their DNA findings on April 25, 1953, in the journal Nature. That two-page research paper set the stage for Nobel Prize in 1962 and opened the way for a revolution in genetics that is continuing today.

More than a month before the Nature publication, Crick described DNA's "beautiful" structure in a seven-page, handwritten letter to Michael, who was then a 12-year-old student at a British boarding school. "My dear Michael," the letter began, "Jim Watson and I have probably made a most important discovery."

The father went on to describe the DNA molecule's workings in detail, and drew a diagram of the now-famous twisted-ladder structure.

Bebeto Matthews / AP

Michael Crick holds the 1962 Nobel Prize medal that was awarded to his father, with his daughter, Kendra Crick, standing by his side. The medal is to be sold during a New York auction on Thursday.

"As far as we know, it's the first written description of how life comes from life," Michael Crick, now 72, told NBC News. He and other family members decided to sell the letter, as well as Francis Crick's 23-carat gold Nobel Prize medal and other personal effects, during a pair of auctions this week in New York.

The timing was chosen to capitalize on the 60th anniversary of the discovery, and Michael Crick speculated that the timing — and the growing importance of genetics — had something to do with the letter's higher-than-expected price. In addition to the letter, the items sold at Christie's included a sketch of Francis Crick by his wife that went for $17,500; and one of the scientist's notebooks, which sold for $21,250. Those items also brought prices significantly higher than the pre-sale estimates.

Watson, who turned 85 years old this month, was in the audience for Wednesday's sale and shared a bottle of champagne with the Cricks afterward, Michael said. 

Francis Crick's Nobel Prize medal and its accompanying diploma are to be sold by Heritage Auctions on Thursday. That lot alone could go for anywhere between $500,000 and several million dollars. Francis Crick's lab coat, his canceled Nobel check and other items will be sold as well. Twenty percent of the proceeds from the Heritage Auctions sale are to be donated to the Francis Crick Institute in London, with the remainder divided among the scientist's heirs.

Michael Crick said he hoped the medal as well as the letter will go on public display to serve as "an inspiration to young scientists all over the world."

The younger Crick has had a long career as a computer programmer and game designer in the Seattle area, and currently puts out a daily series of word puzzles known as "Cricklers." He said he and his wife have already talked about how his new status as a Six Million Dollar Man (or, more accurately, a 2.6 million-dollar man) might change their routine.

"We're very determined not to let it seriously impact our lives," Michael Crick said. "We still want to do our Crickler puzzles every night." 

More about the DNA discovery:

• Science will profit from sale of letter and Nobel Prize
• What about Rosalind Franklin? 'Lost' letters reveal twists
• NBC News archive on DNA

For more information about Michael Crick's DNA letter, including a remembrance of his father and a catalog that shows every page of the letter, check out Christie's website. Check the Heritage Auctions website to learn more about the medal and associated sale items.

Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

This story was originally published on Wed Apr 10, 2013 4:48 PM EDT