SCIENCE

New research papers delivered a devastating double blow to a former NASA astrobiologist's claim to have discovered a bacterium that can feed on arsenic.

Desai may have had the last laugh on all the naysayers; he lived to be 99 years old (in a country where the average life expectancy is only 64).

Two men had quite a scare this weekend when they were attacked by three piranhas in China's Liujiang River.

NASA released new photos of Thursday from the Mars Exploration Rover Opportunity with panoramic pictures showing the terrain at Greeley Haven over four months during the most recent Martian winter.

A magnitude-4.3 earthquake hit just outside Fort Bragg in California on Sunday at about 5:05 a.m. PDT (8:05 a.m. EDT), according to the U.S. Geological Survey, or USGS.

NASA released this week a stunning image produced by combining 817 photographs it was able to capture via the panoramic camera, or Pancam, on the Mars Exploration Rover Opportunity between Dec. 21 and May 8.

Jessica Simpson's deal with Weight Watchers is part of a growing trend in which celebs are cashing in on their weight loss goals. This is particularly true of new moms.

Cat ladies, cockroach slaves, and zombie ants: What do they have in common? They're all probably the unwitting victims of brain-hacking parasites.

Researchers at the University of Arizona claim to have invented a pair of robotic legs that mimic the human gait better than any other artificial leg.

A new camera setup devised by UCLA engineers can pick out one breast cancer cell among a million blood cells.

Health officials in Cambodia are actively investigating the cause of a mystery disease that has killed dozens of children across the country.

Electronic waste, or e-waste, contains deposits of gold, silver and other precious resources used in its manufacture, but the majority of those riches are being left to fester in landfills, experts say.

A fisherman in California got quite the surprise when he hailed in an estimated 800-pound shark on Monday. The fish was so heavy that it had to be dragged back to the dock.

Growth hormone is generally considered safe, and although the new study raises a red flag, its significance is unclear.

A consumer group said Pfizer partly based its claims that Centrum products promote breast and colon health on the presence of vitamin D in the products, despite inconsistent or inconclusive evidence of vitamin D's protective role against breast and colon cancer.

It's an important discovery that could reshape scientists' understanding of the universe forever. But how much did it cost?

Good news beachgoers! A sunscreen pill made from coral could one day render suntan lotion nearly obsolete, which would mean no more slathering on the sunblock every time you hit the beach.

On Tuesday, doctors described the removal process of a 51-pound cancerous tumor in the stomach of a New Jersey woman who delayed getting treated because she didn't have health insurance.

The dazzling lights of the big city have a dark side: they're interfering with astronomers' work, confusing migratory birds and possibly disrupting your sleep cycle.

Two days after welcoming a baby boy, 31-year-old Carla Murphy of Altoona, Pennsylvania smoked bath salts and attacked the maternity ward staff at Altoona Regional Hospital.

Researchers seeking to answer questions about how orangutans can stay in the trees have found it hard to get the actual apes to cooperate in experiments, and are turning to practitioners of parkour, or free-running, instead.

A Japanese study found that among more than 5,000 adults who went into cardiac arrest outside of a hospital, the odds of surviving were up to two times higher when more than one person tried to help.

From city hospitals to tiny rural clinics, India's public doctors will soon be able to prescribe free generic drugs to all comers, vastly expanding access to medicine in a country where public spending on health was just $4.50 per person last year.

Even before the excitement over the discovery of the Boson-like particle could die down, scientists seem to be clamoring for their pound of flesh in staking their claim for the particle discovery, and thereby the Nobel Prize.

Scientists have found a non-invasive way to sequence a baby's genome before birth, allowing parents and doctors to screen the child for a range of diseases and conditions.

In a paper published in the journal Nature, researchers described how they observed the rapid disappearance of a cloud of dust surrounding an infant star in the Scorpius-Centaurus stellar nursery - a hotbed of star formation around 400 light years away from our Sun.

Finding a subatomic particle that seems to be the Higgs boson answers some fundamental questions about the universe -- but there are still some mysteries yet to be solved.

There are more than 2,000 eye injuries from fireworks every year in the United States, most occurring during Independence Day celebrations, but the exact mechanism behind the injuries had escaped researchers until now.

A new study shows that bloodstream infections caused by MRSA, short for methicillin-resistant Staphylococcus aureus, are dropping amongst military personnel, signaling that the superbug may be on the decline throughout the US.