Carbon-based computer chips give new meaning to the term "organically grown."

Rats on Christmas Island are the first-known case of extinction caused entirely by disease.

After a five-month stint on Mars, Phoenix ends a troubled but fruitful mission.

Thousands of years of Chinese history are illuminated by a single stalagmite.

Warming shortens the period when lemmings can burrow in wintry havens.

A 700-ton mining truck gets a hi-tech upgrade thanks to a DARPA-sponsored challenge.

Air pollution and dust can increase the chances of a tornado forming.

NASA auctions off licensing rights to patents and patent applications.

Honda develops a device that makes it easier for people to walk and climb.

The current warming trend is unmatched in the time since human civilization began.