Ancient footprints discovered in Canada are the earliest known evidence of reptiles, providing insight into how amphibians evolved to live on land, researchers say.

A warmer climate in Greenland has opened up new possibilities for economic development, but it may have negative effects on the island's native people, WWF says.

Tiny squid, red jellyfish, and lantern fish are among the hundred exotic sea creatures pulled from the depths off the Philippines.

A massive titanosaur recently unearthed in Argentina is one of the largest and most complete giant dinos ever discovered, experts say.

Faint stars that formed as much as ten billion years ago reveal that a supposedly young galaxy is actually a "developmentally challenged" grown-up, astronomers say.

Che remembered, rare animals pelts destroyed, and more.

Odds are 50/50 that the dinosaur that left this mark was a Tyrannosaurus rex, says the scientist who announced the find. Whatever it was, it was big.

The first set of highly detailed color images from a Mars Reconnaissance Orbiter camera will help scientists chose a landing site for a new rover due to be launched in 2009.

The first ever high-resolution images of Iapetus have helped crack the mystery of its rare color scheme.

Moon shuttles, rocket racers, and Mars bases are just some of the space highlights historians will commemorate 50 years from now, experts say.

Typhoon lashes Vietnam, Russia remembers Sputnik, volcano blows in Yemen, and more.

In a dramatic impact never before seen by scientists, a solar hurricane detached the Encke comet's plasma tail.

Thousands of sparkling young stars are enveloped by the giant nebula NGC 3603, located in the Milky Way about 20,000 light-years away from our solar system.

See the tragic results of a freak accident on an Kenyan river, and learn more about the animals' epic annual migration.

Oktoberfest starts flowing, protesters march in Myanmar, Mars rover reaches a crater landmark, and more.