Thanks to global warming, within the lifetimes of certain reptiles in the South Pacific, all members of their species could be born male.

Gas prices may need to climb more before most of us do the right thing.

Cruising in an icebreaker to the top of the world, scientists identified the aftermath of an event once thought impossible: a violent volcanic eruption on the deep-sea floor.

New fossils of an ancient, four-limbed creature help fill in the blanks of the evolutionary transition between fish and the first land-adapted vertebrates.

Three teams suggest that a huge object slammed into Mars, giving the planet an unusually dualistic topography.

An experiment may explain the origin of underwater waves that shape the sediment of continental slopes.

The Arctic tundra is under assault from trees, with serious implications for global climate change.

Past abrupt climate change in the North Atlantic could have started as far south as China, scientists say.

Phoenix Lander gets first close-up of Martian soil.

A European astronomy group beamed a video of a Doritos sacrifice to the god of salsa at a possible alien race in a star system associated with the Big Dipper.

Instrument succeeds in capturing first soil sample, allowing Mars Phoenix Lander team to begin scientific studies.

Leaves mostly keep their cool (or warmth) wherever they live, a finding that might affect reconstructions of past climates.