Titan has lakes of methane and a hydrological cycle that resembles in uncanny detail the one found on Earth, a new study finds.

It looks like a shiny lump of fool's gold, and the curious metallic lump that smashed into a New Jersey home certainly has authorities fooled as to what it is.

Strange specimens of natural glass found in the Egyptian desert are products of a meteorite slamming into Earth between 100,000 and 200,000 years ago, scientists say.

A dead star with an unusual ring of metal-rich gas could be a vision of the future for researchers wondering what our solar system will look like in several billion years.

An unusual gamma-ray burst has astronomers wondering what new type of cosmic explosion could have created the brilliant blast of light.

Spurred on by new evidence of water, experts announced plans to use powerful cameras to seek rock-solid proof that the liquid hasn't stopped flowing on Mars.

See a roundup of the week's news and events, from a dictator's demise to a meteor's blaze of glory to a tiger "trapped" by a remote camera.

The first ever analyses of comet dust are in, and they stand to revolutionize our understanding of the early solar system, scientists say.

The Cassini spacecraft has sent back images of the largest mountain range yet found on Saturn's giant moon.

This week: New photos may show liquid water on Mars, NASA plans moon base, city birds sing faster, ancient "curse tablet" found, and more.

The Gospel of Judas unveiled. A "lost world" of animals discovered. Explore these and other highlights of the year in nature, science, and exploration with our most popular news stories of 2006.

Replay the year in science, nature, and exploration with 2006's top ten videos, from the plight of African elephants to some of the animal kingdom's mightiest battles.

NASA released images today that reveal water likely flowed through Martian gullies within the past few years, providing a "squirting gun" of liquid water's presence on the red planet.

The lunar outpost will be built at one of the moon's poles, where near constant sunlight makes solar power feasible, officials said.

This week: Al Gore interview, wasps' "pepper spray" weapon, pre-Inca tomb discovery, chemical secret of Stradivarius violins, new butterfly species, and more.