A federal judge imposed limits on water flows caused by huge pumps he says were drawing in and destroying a threatened fish.

What would happen if earth’s most invasive species — humans — were wiped out?

Negotiators from 158 countries reached basic agreement on rough targets aimed at getting some of the world’s biggest polluters to reduce emissions of the greenhouse gases blamed for global warming.

Power failure? Some hybrid owners are plugging their houses into their cars to provide backup electricity.

These sesame seed-sized creatures carry a record of hundreds of millions of years of geological history.

In two papers published on Friday, I.B.M. researchers describe techniques that would allow electronics to be made from components far smaller than today’s transistors and wires.

Public fears aside, scientists mimic nature’s genetic scrambling to bolster fruits and vegetables, as well as beer and whiskey.

A panel of judges approved the use of high-intensity sonar during military exercises in the Pacific, despite worries about its potentially lethal effect on whales and other marine mammals.

The density of billboards advertising tobacco products is more than twice as high in black neighborhoods as in white.

Experts say a large white animal swimming in the Yangtze River is a member of a dolphin species unique to China and feared extinct.

Gestational diabetes may be associated with a substantially increased risk for pancreatic cancer, a new study has found.

The discovery of a vast web crawling with millions of spiders spreading across several acres of a North Texas park is causing a stir.

Dr. MacCready was an awesomely accomplished inventor who studied circling hawks and vultures to figure out how to realize the loftiest dream of Leonardo da Vinci — inventing a human-powered flying machine.

Twenty-eight workers at one of NASA’s top research centers said security measures that include questions about loyalty and sexual orientation are unconstitutional.

Big animal rights groups do not share the same mission, but they have coalesced around a message that eating meat is worse for the environment than driving.

Although willingness to donate organs has risen in recent years, major hurdles remain.

For generations, parents have told their children never to swallow chewing gum.

The police arrested six people at a police roadblock near a beach in Oaxaca, where the eggs are a delicacy believed to have aphrodisiac powers.

Charles Lindbergh and a Nobel Prize-winning physician shared an interest in eugenics and the perfection of the species.

An anthropologist looks into the roots of the open-hand shrug gesture and finds they run deep.

A world-renowned primatologist’s research of monkeys in the Amazon has led to a prison sentence of nearly 16 years in Brazil.

Some studies suggest that obesity in middle age may be a risk factor for dementia and others show that weight loss precedes dementia’s onset.

His heart stopped. I saved his life. Cut to four years later, and an angry face-off.

It may be that when adults talk to babies, they use a language that is universally understood.