Silver fillings used to patch cavities aren't dangerous even though they expose dental patients to the toxic metal mercury, federal health researchers said.
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
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
In a finding that could help treat an inherited form of baldness, a research team in Manchester claims to have discovered a protein "code" that instructs cells to sprout hair.
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
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
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.
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.
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
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.
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.
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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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.
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
Cruise called the field of psychiatry "pseudoscience" and criticized Adderall and Ritalin, the prescription drugs prescribed for ADHD and hyperactivity in children, and also called actress Brooke Shields' decision to medically treat dep
In what could prove to be a medical milestone, researchers have succeeded in generating new lines of human embryonic stem cells without destroying the embryo. The breakthrough may enable scientists to circumvent the ban on federal
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
Although previous researchers estimated that there were about 200 species of venomous fish ... a curator at the museum, recently published a study suggesting at least 1,200. Many carry their venom in spines and barbs, some in fangs.
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.
An Indian businessman born with two penises wants one of them removed surgically as he wants to marry and lead a normal sexual life, a newspaper report said.
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
They could be the missing links of human genetic evolution -- areas of human DNA that changed dramatically after the evolutionary division from chimpanzees, though they had remained almost unchanged for millennia before.
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.
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
A fundamental force that holds electrons inside atoms and governs how charged particles and light interact is a little weaker than previously thought, scientists reported today.
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
Researchers say they have developed a test that can predict with near certainty whether the most common form of lung cancer will return after surgery.
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.
A new technique allowing virtual dissections of half-billion year old fossil embryos is producing the first three-dimensional images of the dawn of life. It reveals a universe of detail impossible using previous methods much as the electron microscop