There's only so much you can do searching for extraterrestrial life when you're Earthbound. One approach is to locate and study the best terrestrial examples of what might resemble conditions that could support life on another planet.

A new study casts doubt on a long-standing belief about the power behind gamma-ray bursts, the most energetic explosions in the universe.

Martian soil around NASA's Phoenix Lander is slightly alkaline and has enough different minerals that it could support Earthly plants and--more to the point--microbes beneath the Martian surface.

Cracks in the planet's crust imply a contracting world

Ancient stone artifacts reveal the day-to-day lives of Clovis people while offering tantalizing clues of an even earlier culture.

The Red Planet seems to have been the victim of a massive hit and run more than four billion years ago. Hemisphere-size crater documents solar system's violent origins

Voluntary efforts by manufacturers are beginning to eliminate some of the most toxic compounds in e-waste.

As cars become smarter than the people driving them & do more of the things humans should be doing for themselves: it was only a matter of time before a car started reading road signs.

Drizzle once fell on Martian soil, according to a new geochemical analysis by Berkeley scientists, though the rain probably stopped several billion years ago.

How did space and time come about? How did they form the smooth four-dimensional emptiness that serves as a backdrop for our physical world? What do they look like at the very tiniest distances?