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Science, Medicine and Technology

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LiveScience.com

Insect bite marks in ancient leaf fossils are shedding new light on how nature bounced back after an asteroid impact killed off the dinosaurs and much of life on Earth 65 million years ago. Plant and insect biodiversity is strongly linked today: W

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AP

A new, deadly strain of tuberculosis has killed 52 of 53 people infected in the last year in South Africa, the World Health Organization said, calling for improved measures to treat and diagnose the virus. [note: TB is caused by a bacterium, not a vi

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Guardian

Drinking fruit and vegetable juice on a regular basis can dramatically reduce the chances of developing Alzheimer's, according to a study appearing today in the American Journal of Medicine. Researchers in Japan and the US

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LiveScience.com

Paleontologists have uncovered a 25-million-year-old whale fossil with a monstrous set of teeth and enormous eyes on the coast of Australia. The discovery has researchers rethinking whales’ evolutionary history.

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LiveScience.com

Humans have more copies of a possibly important brain gene in their genomes than other apes. The gene is implicated in the function of the neocortex, the region of the brain that, in humans, is responsible for consciousness, language, and other highe

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LiveScience.com

Scientists have yoked bacteria to power rotary motors, the first microscopic mechanical devices to successfully incorporate living microbes together with inorganic parts. "In far future plans, we would like to make micro-robots driven by biol

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LiveScience.com

The notion that the tongue is mapped into four areas—sweet, sour, salty and bitter—is wrong. There are five basic tastes identified so far, and the entire tongue can sense all of these tastes more or less equally.

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LiveScience.com

The largest unmanned aircraft to rely solely on hydrogen fuel has flown successfully during tests. The plane, with a 22-foot-wingspan, is powered by a fuel-cell system that generates 500-watts—equal to five bright light bulbs.

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LiveScience.com

A decade ago, scientists successfully developed sperm in one animal that had come from cells in another. Researchers began by growing rat sperm in mice, and proceeded to foster sperm from hamsters, rabbits, pigs, bulls and humans in mice as well.

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NY Times

The endangered Florida manatee is as unusual in its physiology, sensory capabilities and brain organization as in its external appearance. Far from being slow learners, manatees, it turns out, are as adept at experimental tasks as dolphins

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LiveScience.com

Earth might have spun on its side to keep its balance in the distant past, and could do so again, scientists reported today. Alaska was suddenly at the equator, the thinking goes. Scientists already know that the North Pole wanders over time.

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USA Today

The FBI has begun permitting police investigators to pursue some criminal suspects by tracking the DNA of close relatives who have been convicted of other offenses. Such "partial-match searches" could greatly increase the number of cases so

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LiveScience.com (video links)

Scientists have discovered the fastest bite in the world, one so explosive it can be used to send the Latin American ant that performs it flying through the air to escape predators. These powerful jaws could serve as inspirations for the propulsio

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AP

A mix of bacteria-killing viruses can be safely sprayed on cold cuts, hot dogs and sausages to combat common microbes that kill hundreds of people a year, officials said in granting the first-ever approval of viruses as a food additive.

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CNET

In simpler terms, they've shown 400,000 different naturally occuring variations in genetic code, or so-called polymorphisms, which can help explain idiosyncrasies in humans. "That's where all this genetic research is headed

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OPB

University of Washington researchers say they've used stem cells to help repair mouse retinas in the lab. That could help people with macular degeneration. Thomas Reh is professor of biological structure and lead researcher in the study.

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LiveScience.com

Physics professor David Willey doesn't use chalk and formulas to spark his students' interest in thermodynamics. He walks on fire. "Nothing gets a student's attention like the possibility that I might kill myself," said Willey

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AP

Descendants of extinct mammals like the giant woolly mammoth might one day walk the Earth again. It isn't exactly Jurassic Park, but Japanese researchers are looking at the possibility of using sperm from frozen animals to inseminate living relat

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LiveScience.com

Treating malaria and other diseases caused by parasites requires a good understanding of the parasite. A new video of the malaria parasite at work should help researchers develop better treatments. The malaria parasites, Plasmodium falciparum and

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LiveScience.com

A new type of robot balances on a ball rather than relying on legs or wheels. The Ballbot, as it is called, can move in tight spots, making it potentially more useful than other designs for some uses.

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