Jupiter's moon Europa appears to have key ingredients for life, scientists say, adding that the time to explore it is now.

NASA's Spitzer Space Telescope has detected light from two distant planets. The scientific first opens a new era in which scientists can directly observe the extrasolar worlds that orbit distant stars.

Infants can recognize a wide range of faces, even among races or species different from their own, but the skill diminishes with age, a new study says.

Scores of studies have shown that olive oil, which is high in "good" fat, may prolong life by combating coronary heart disease and different types of cancer.

A physicist believes a fireball he created in a New York particle accelerator may have been a black hole.

At the Alcor Life Extension Foundation, 67 bodies—mostly just severed heads—lay cryogenically preserved in liquid nitrogen, waiting for the day when science can reanimate them.

Even if we stop burning oil and coal, warming won't stop soon, a new study says. But we can avoid making it much worse, experts say.

The quake that triggered the December 26 tsunami has increased stress on nearby faults, making another major South Asian quake more likely, scientists say.

A stream of scientific analysis confirms that water once soaked Mars, raising the possibility of life there. Now, scientists say they may know where to look for it.

Advocates of manned space trips to Mars say it is only a matter of time before astronauts visit, and potentially colonize, the red planet.

It had enough force to blast a crater larger than 20 football fields. So where's the melted rock at this Arizona landmark? Now scientists say they know.

The number of marine-animal species rises and falls every 62 million years, a new study says. Among the leading suspects: comets.

CT scans of Tutankhamun found no physical evidence of murder. But they did reveal unusual features, including a broken leg that may have helped kill him.

How do flocks, herds, and schools change course in near perfect synchronization? The answer is simple, a new computer model suggests.

Tiny fossils found in October do in fact represent a new human species, and its smart but small brain could overturn decades of evolution theory, experts say.