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Researchers found that mercury content of avian blood and feathers doesn’t match that found in eggs, which they say is most indicative of reproductive harm. The results suggest that scientists shouldn’t assume the tissues can be used interchangeably for mercury risk assessment.

Six people were dead and seven missing after a powerful tornado ripped through a neighborhood that included housing for the poor in the north Texas town of Granbury, marking the deadliest severe storm outbreak in the United States so far this year.

At times the vicious feud between Bangladesh’s two political dynasties distracts the world’s attention from the country’s biggest challenges: its unique vulnerability to natural disasters, environmental degradation and the mass migration that they cause.

Dramatic success, and the brash confidence of founder Elon Musk, has some fans calling Tesla the first successful new American car maker in more than a generation. But some analysts say the electrifying rise is not what it seems.

Attention swimmers: More than half of the public pools tested in a new study contained bacterial evidence that someone may have pooped in the pool.

How the West Fertilizer Co. fire began still isn’t known. But the probe has unveiled the detailed sequence of a catastrophe: Heat, pressure and shock made dual explosions, milliseconds apart, that killed 15 people and left a town to mourn, clean up and start over.

At least 1,800 garment workers have died in Bangladesh factories since 2005. The tragedy of Rana Plaza is ushering in talk of reform, though skepticism persists in the streets of Dhaka.

The latest and largest-yet outbreak of a lethal new SARS-like virus centered on Saudi Arabia seems to be spreading chiefly by close person-to-person contact, the World Health Organization and Saudi doctors said on Thursday.

University of California, Davis researchers have discovered swine flu in California elephant seals, but the marine mammals don't exhibit any large runny noses. The scientists detected the H1N1 virus in free-ranging northern elephant seals off the Central California coast.

Here's a good reason never to swallow water from a swimming pool: A new study found telltale signs of feces in more than half of pools sampled in Atlanta last summer.

A new influenza strain called H7N9 that has killed 35 people in China and sickened close to a hundred more has raised an important question once again: Can we produce enough vaccine fast enough if this flu virus, or any other one, turns pandemic tomorrow?

There’s another ice reserve to worry about beyond the melting ice sheets of Greenland and Antarctica: The many thousands of smaller glaciers unconnected to continental-scale ice sheets. They’re melting, too, and a new report suggests they're contributing just as much as the giants.

Scientists thought that the rise in carbon dioxide would have an impact on climate change and temperatures would be driven steadily upwards. But figures show that they been at a standstill since 1998 - fueling assertions by climate skeptics that the science behind global warming is in question.

Turkey hunting in Texas dried up along with the state's water due to the epic drought of 2011. And while the drought has relented, turkey season hasn't been the same.

The Obama administration drew sharp criticism from environmental and oil industry groups Thursday when it issued a new draft of regulations for fracking on federal and Indian lands.

Physicist Ernest Moniz won unanimous Senate confirmation Thursday to be the nation's new energy secretary. Moniz, 68, a professor at the Massachusetts Institute of Technology, served as an energy undersecretary in the Clinton administration.

An invasion of alien "crazy ants," native to northern Argentina and southern Brazil, is making many residents of the U.S. Gulf Coast long for the old days of pesky, biting fire ants.

Thousands of protesters have gathered in the southern Chinese city of Kunming for the second time this month to voice concerns over the environmental impact of a planned chemical plant.

Fed up with oil spills from facilities belonging to Mexico’s state oil company Pemex, residents of two communities in the southeastern state of Tabasco are taking the country’s largest company to court in a bid for compensation for damage to the environment and agriculture.

The U.S. organic food industry is gaining clout on Capitol Hill, prompted by rising consumer demand and its entry into traditional farm states. But that isn't going over well with everyone in Congress.