Researchers have published a rare description of a wild chimpanzee devising and modifying a novel form of tool use.

Polar bear declared "threatened," but Secretary limits decision's impact.

A kilometers-long ice core from Antarctica has been recording climate information for the past 800,000 years and has revealed a three millennia–long period when carbon dioxide levels in the air were lower than any previously measured.

Monster data crunch strengthens case that climate is disrupted.

More than 1,500 young scientists flexed their mental muscles this week at the world's largest high-school science competition.

Researchers have constructed the first 3-D image of a jet of gas zooming out of the sun's outer atmosphere, revealing the role that twisted magnetic fields play in generating such outbursts.

Some of the world’s brightest young minds spent the day explaining their research projects in a packed exhibit hall in Atlanta at the Intel International Science and Engineering Fair.