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The find supports the idea that Europe and North America were once connected by a series of temporary land bridges that allowed dinosaurs to cross.

Another round is fired in the heated debate over where this diminutive creature goes on our family tree.

An informal straw poll of New Yorkers reveals that many think global warming and El Nino are somehow contributing to this year's unusually mild winter.

Is global warming behind this year's warm winter? Yes and no, scientists say.

They look like baseballs and soccer balls. But they could reveal how the earliest known egg-laying organism developed from embryo to adulthood.

Bats are more efficient fliers than even birds, thanks to a novel lift-generating mechanism that is unique amongst flying creatures.

Scientists have unearthed the fossil of a young, two-headed marine reptile that lived when dinosaurs still walked the Earth.

Male fish with female characteristics in the Potomac River Basin are linked to chemicals found in pesticides, flame retardants and personal-care products.

The air you breathe is teeming with more than 1,800 kinds of bacteria, including harmless relatives of microbes associated with bioterrorist attacks, according to a new study.

Tigers in one national park are poached relentlessly, but amazingly their population remain stable. The picture is not so rosy elsewhere as these giant cats are hunted to the brink of extinction.

VIDEO: A new computer simulation recreates a catastrophic tsunami that spawned waves up to 130 feet tall.

The dinosaur's extinction was triggered by a single large meteorite striking the Yucatan Peninsula, and did not involve additional meteorite impacts or other stresses, a new study finds.

A new study of a small group of people who can "taste" words could help reveal how cognition and perception in all of us.

It might be a treasured value in many human cultures, but monogamy is rare in the animal kingdom at large. Yet that doesn't mean it's boring.

A wayward piece of the Appalachian Mountain discovered in Mexico is forcing scientists to redraw their map of ancient Earth.

Scientists have figured out why a small owl lines its underground nests with the poop of other animals.

Two of the most detailed Neanderthal DNA sequencing projects ever performed are shedding new light on the shared evolutionary past of ourselves and our closest extinct relative.

Biologists from the Wildlife Conservation Society temporarily captured and studied two of the world’s most endangered big cats: the Siberian tiger and Far Eastern leopard.

It's the bane of every student, but the upside to taking frequent tests is that it enhances long-term memory, according to a new study.

It's not a cure for the common cold, but a new study is certainly something to cheer about. Go ahead: Be happy!

Of all primates, human eyes are the most conspicuous. A new study supports a theory explaining why our eyes are meant to see and be seen.

Tool use in crows is a combination of natural ability and schooling by other crows.

In just a few decades, sea level could rise a foot, putting the Big Apple at risk of serious storm flooding.

Today, South America's windy Amazon River flows in an easterly direction across the continent, dumping water into the Pacific Ocean. But it wasn't always this way.

The finding supports the idea that an ancient Copper age people living in the region were not only hunting the creatures, but domesticating them as well.