Archaeologists Dive Deep Into The Lost World Of The Maya

From USA Today:

CARA BLANCA, Belize — Machete chops echo and leaves rustle underfoot when the vines clear, revealing cobalt-blue water in a cliff-sided pool.

Hidden beneath the dry-season forest, these waters, the blue cenotes (cen-NO-tays) of Cara Blanca, represent a mystery for scholars, one left by the ancient Maya. What lies within these sacred wells?

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My Comment: A compelling and a must read on Mayan history.

Human Sperm Created From Stem Cells In World First, Claims British University

From The Telegraph:

British scientists have created human sperm using stem cells in a medical first that could revolutionise fertility treatment, they claim.

Researchers at the pioneering Northeast England Stem Cell Institute say they have made the breakthrough using stem cells from an embryo.

They claim that with some minor changes the sperm could theoretically fertilise an egg to create a child.

Within 10 years, the scientists say the technique could also be used to allow infertile couples to have children that are genetically their own. It could even be possible to create sperm from female stem cells, they say, which would ultimately mean a woman having a baby without a man.

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New Evidence That Vinegar May Be Natural Fat-fighter

Found in many salad dressings, pickles, and other foods, vinegar could help prevent accumulation of body fat and weight gain, scientists report. (Credit: Wikimedia Commons)

From Science Daily:

ScienceDaily (July 7, 2009) — Researchers in Japan are reporting new evidence that the ordinary vinegar — a staple in oil-and-vinegar salad dressings, pickles, and other foods — may live up to its age-old reputation in folk medicine as a health promoter. They are reporting new evidence that vinegar can help prevent accumulation of body fat and weight gain.

Tomoo Kondo and colleagues note in the new study that vinegar has also been used as a folk medicine since ancient times. People have used it for a range of ills. Modern scientific research suggests that acetic acid, the main component of vinegar, may help control blood pressure, blood sugar levels, and fat accumulation.

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Humans Ate Fish 40,000 Years Ago

Chinese fishermen haul in the catch of fish from the frozen Chagan Lake in Songyuan, northeast China's Jilin province on December 25, 2008, at the start of the winter fishing season. Chagan Lake covers an area of 259 square kilometers and is one of the 10 largest freshwater lakes in China, where each winter, fishermen use the ancient method of breaking the ice with wooden stakes before placing their nets to harvest the fish. Getty Images

From Live Science:

At least one of our ancestors regularly ate fish 40,000 years ago, a new study finds.

Scientists analyzed chemical compositions of the protein collagen in an ancient human skeleton from Tianyuan Cave near Beijing to reach their conclusion.

Fishing at this time must have involved considerable effort, the researchers think, because fossil records suggest humans were not using sophisticated tools — beyond crude stone blades — until about 50,000 years ago.

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Ray Kurzweil on How to Combat Aging

From Technology Review:

The noted futurist says that exponential advances will allow us to intervene in the aging process.

Submitted in response to Technology Review's interview with Leonard Hayflick. See "Can Aging Be Solved?"

Entropy is not the most fruitful perspective from which to view aging. There are varying error rates in biological information processes depending on the cell type, and this is part of biology's paradigm. We have means already of determining error-free DNA sequences even though specific cells will contain DNA errors, and we will be in a position to correct those errors that matter.

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Stephen Hawking: "Humans Have Entered A New Stage Of Evolution"

From The Daily Galaxy:

Although It has taken homo sapiens several million years to evolve from the apes, the useful information in our DNA, has probably changed by only a few million bits. So the rate of biological evolution in humans, Stephen Hawking points out in his Life in the Universe lecture, is about a bit a year.

"By contrast," Hawking says, "there are about 50,000 new books published in the English language each year, containing of the order of a hundred billion bits of information. Of course, the great majority of this information is garbage, and no use to any form of life. But, even so, the rate at which useful information can be added is millions, if not billions, higher than with DNA."

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Coffee 'May Reverse Alzheimer's'

From The BBC:

Drinking five cups of coffee a day could reverse memory problems seen in Alzheimer's disease, US scientists say.

The Florida research, carried out on mice, also suggested caffeine hampered the production of the protein plaques which are the hallmark of the disease.

Previous research has also suggested a protective effect from caffeine.

But British experts said the Journal of Alzheimer's disease study did not mean that dementia patients should start using caffeine supplements.

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Buzz Aldrin: Why We Should Leave The Moon Alone And Settle Mars Instead

Photo: Buzz Aldrin is pictured standing on the moon,
which Neil Armstrong can be seen reflected in his visor.

From The Daily Mail:

Nasa astronaut Buzz Aldrin, the second man to walk on the Moon, has urged the world to forget about returning to our nearest satellite and head to Mars instead.

'Why do we want to go to go back to the Moon?' he asked.

'Some nations want to go for prestige to say they are 'first' in space exploration in the 21st century and they want Nasa to compete with them.

'But there's no reason for us to go back. We can look at the effects of long-term missions in space by flying around comets, rather than setting up a base on the Moon. We're not going to launch any missions from there.'

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Reasons Not to Panic Over a Painkiller

From The New York Times:

Few drugs are more ubiquitous than acetaminophen, the pain reliever found in numerous over-the-counter cold remedies and the headache drug Tylenol.

But last week, a federal advisory committee raised concerns about liver damage that can occur with overuse of acetaminophen, and the panel even recommended that the Food and Drug Administration ban two popular prescription drugs, Vicodin and Percocet, because they contain it.

The news left many consumers confused and alarmed. Could regular use of acetaminophen for pain relief put them at risk for long-term liver damage?

To help resolve the confusion, here are some questions and answers about acetaminophen.

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How Can YouTube Survive?

Brand of the free: Founder Jawed Karim appeared in the first video, of elephants at a zoo

From The Independent:

It's wildly popular - and thought to be losing hundreds of millions of dollars a year. Now questions are being asked about the future of YouTube. Rhodri Marsden investigates a mystery of digital-age 'freeconomics'

It must surely rank as the most mundane business launch in history. Jawed Karim, one of the founders of YouTube, shuffles timidly in front of a video camera while standing in front of a group of elephants at San Diego zoo, with precious little idea of what he was starting. "The cool thing about these guys," he says, nervously gesturing behind him, "is that they have really long trunks. And that's pretty much all there is to say."

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Caffeine Reverses Memory Impairment In Mice With Alzheimer's Symptoms

Coffee drinkers may have another reason to pour that extra cup. When aged mice bred to develop symptoms of Alzheimer's disease were given caffeine -- the equivalent of five cups of coffee a day -- their memory impairment was reversed. (Credit: iStockphoto/Royce DeGrie)

From Science Daily:

ScienceDaily (July 6, 2009) — Coffee drinkers may have another reason to pour that extra cup. When aged mice bred to develop symptoms of Alzheimer's disease were given caffeine – the equivalent of five cups of coffee a day – their memory impairment was reversed, report University of South Florida researchers at the Florida Alzheimer's Disease Research Center.

Back-to-back studies published online July 6 in the Journal of Alzheimer's Disease, show caffeine significantly decreased abnormal levels of the protein linked to Alzheimer's disease, both in the brains and in the blood of mice exhibiting symptoms of the disease. Both studies build upon previous research by the Florida ADRC group showing that caffeine in early adulthood prevented the onset of memory problems in mice bred to develop Alzheimer's symptoms in old age.

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How Global Catastrophe Could Make Us Smarter

From Live Science:

When supervolcanoes blow their tops, the world's climate is altered and life is snuffed out regionally and challenged globally. Such an event is thought to have occurred 74,000 years ago when the Toba supervolcano erupted in what is now Sumatra with a force estimated to be 1,000 to 10,000 times that of Mount St. Helens.

The timing of Toba's tempest fits with an interesting bottleneck known to exist in human evolution, as seen in DNA evidence. The population became very small sometime between 90,000 and 60,000 years ago. And a new idea floating around suggests that the eruption may have contributed — by necessity — to our supreme intelligence today. Further, it has been suggested, we may be undergoing the next great leap in smarts right now.

More on all that lower down. First, some fresh research on the eruption:

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Coming Soon: Photographic Memory In A Pill?

RGS-14: Will you remember what this protein looks like 2 months from now?

From Popsci.com:

Scientists isolate a protein that significantly increases visual recall.

Wish you had a photographic memory? Well, Encyclopedia Brown, drugs may amp your brain up to that point soon. A group of Spanish scientists claim to have singled out a protein that can extend the life of visual memory significantly. When the production of the protein was boosted in mice, the rodents' visual memory retention increased, from about an hour to almost 2 months.

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Who is Neil Armstrong?

Neil Armstrong

From The BBC:

A hero to millions, Neil Armstrong has consistently shunned the limelight. To mark the 40th anniversary of the first manned Moon landing, author Andrew Smith travelled across America to discover why the man who first set foot upon the Moon remains such an enigma.

His words on being the first person ever to set foot on the Moon have been written into soundbite history - but in the four decades since Neil Armstrong became a household name, he has also increasingly become an enigma.

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July 4, 1776: Preserving the Declaration

From Wired:

1776: The Declaration of Independence is signed. It will take 127 years before someone gets around to saying, “Hey, maybe we should preserve this thing.”

The Declaration of Independence can be fairly said to stand alongside the Magna Carta and Bill of Rights as the most important documents in the history of democracy. Its significance was understood from the moment it was signed, so one is left to wonder why its preservation was ignored for so long.

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'The Eagle Has Landed': A Space Geek Remembers The Moon Shot

Fly me to the Moon: the Apollo 11 ahead of lift-off on 16 July 1969. Getty

From The Independent:

As a 10-year-old 'space geek', Paul Rodgers was glued to the television when Neil Armstrong uttered the immortal words, 'The Eagle has landed.' Forty years on, he looks back at mankind's giant leap – and the Cold War politics that turned the space race into a mad dash

The first sign of trouble came when the Eagle was five minutes into its descent, 33,500ft above the Moon's surface. A shrill alarm rang through the cramped, seatless cabin in which two astronauts stood facing the stars. An error message flashed up on their primitive computer's tiny read-out: "1202". Neither Neil Armstrong nor Buzz Aldrin knew what it meant. It was left to Steve Bales, a 26-year-old technician at Mission Control in Houston to decide they should keep going. The error, he was fairly sure, would fix itself, and he repeatedly called "Go!" as the alarm sounded four more times.

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'Greedy' Trees Still Leave Room For The Little Plants

From New Scientist:

While they might hog the bulk of the resources, trees still leave enough "crumbs" for smaller neighbouring plants to eke out a living, researchers say. The finding contradicts previous notions of plant competition and adds support to a new view of how a plant's size affects the survival and composition of its neighbouring species.

Previously, it was assumed that trees and other large plants monopolized sunlight, water, and other available resources, limiting the number of smaller plant species that can coexist in their vicinity. Research in greenhouse settings supported this view.

Now a study of forests in southern British Columbia shows that larger plants do not always correlate with fewer species in an area.

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World's Oldest Bible Goes Online 1,600 Years After It Was Penned On Parchment

Reunited: Pages of the world's oldest surviving Christian Bible, the Codex Sinaiticus have been brought together for the first time online

From The Daily Mail:

Over 800 pages of the earliest surviving Christian Bible have been recovered and made available on the internet.

More than half of the 1,600-year-old Codex Sinaiticus manuscript has been pieced together in a joint effort between institutions in the UK, Germany, Egypt and Russia.

Now high-resolution digital images of the recovered pages of the 4th century book - written in Greek on parchment leaves - have been made available at www.codexsinaiticus.org.

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Paralyzed People Using Computers, Amputees Controlling Bionic Limbs, With Microelectrodes On (Not In) Brain

Photo: Microwires emerging from the green and orange tubes connect to two arrays of 16 microelectrodes. Each array is embedded in a small mat of clear, rubbery silicone. The mats are barely visible in this image. These microelectrode arrays sit on the brain without penetrating it, a step toward longer-lived, less invasive versions of "neural interfaces" that in recent experiments elsewhere have allowed paralyzed people to control a computer cursor with their thoughts. The new microeletrode arrays were placed in two patients at the University of Utah who already were undergoing brain surgery for severe epilepsy. The larger, numbered, metallic electrodes are used to locate the source of epileptic seizures in the brain, so the patients allowed the micoelectrodes to be placed on their brains at the same time. (Credit: University of Utah Department of Neurosurgery)

From Science Daily:

ScienceDaily (July 6, 2009) — Experimental devices that read brain signals have helped paralyzed people use computers and may let amputees control bionic limbs. But existing devices use tiny electrodes that poke into the brain. Now, a University of Utah study shows that brain signals controlling arm movements can be detected accurately using new microelectrodes that sit on the brain but don't penetrate it.

"The unique thing about this technology is that it provides lots of information out of the brain without having to put the electrodes into the brain," says Bradley Greger, an assistant professor of bioengineering and coauthor of the study. "That lets neurosurgeons put this device under the skull but over brain areas where it would be risky to place penetrating electrodes: areas that control speech, memory and other cognitive functions."

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Tropical Rainfall Moving North

The band of heavy precipitation indicates the intertropical convergence zone. The new findings are based on sediment cores from lakes and lagoons on Palau, Washington, Christmas and Galapagos islands. Credit: University of Washington

From Live Science:

Earth's most prominent rain band, near the equator, has been moving north at an average rate of almost a mile (1.4 km) a year for three centuries, likely because of a warming world, scientists say.

The band supplies fresh water to almost a billion people and affects climate elsewhere.

If the migration continues, some Pacific islands near the equator that today enjoy abundant rainfall may be starved of freshwater by midcentury or sooner, researchers report in the July issue of the journal Nature Geoscience.

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