Six gorilla orphans of a critically endangered species have been released on an isolated African island. Conservationists hope to move the gorillas into the wider wilderness within three years. Video

If Dunkin' Donuts were to set up shop in space, it might open next to WASP-17b, a backward-orbiting planet that's larger than Jupiter and roughly as dense as polystyrene foam.

Chances are, you're carrying drug money. Nearly nine out of ten bills in the U.S. and Canada are laced with cocaine, a new study says.

Hans Christian Orsted: If you've ever used a modern gadget, chances are you have this 19th-century Danish physicist to thank—and what better time than on his 232nd birthday?

NASA helicopters have lowered about a dozen monitoring "spiders" in and around Mount St. Helens's volcanic crater to better predict major eruptions. Video.

On foot, photographer Joe Riis provides an intimate window on one of North America's longest annual migrations, which is increasingly threatened by fences and highways. Video.

The privileged, heavily shielded few aboard the International Space Station should be able to safely see the Perseid meteor shower. Space shuttle astronauts might not be so lucky.

After Wednesday night the popular Perseids tapers off, bringing to a close a sky show made especially dazzling thanks to ... Saturn?

Boggle your noggin with five far-out Perseid meteor shower puzzlers.

The Perseid meteor shower peaks this week, and in the Northern Hemisphere the Perseids may be the best—or at least most convenient—meteor-watching event of the year. So what's it all about?

The Perseid meteor shower is more than a "geek pickup line." Even this year, when the moon's glare will present stiff competition, astronomers predict a dazzling Perseids show Tuesday night.

Sarah Palin isn't the only one who supports hunting from a helicopter. The Australian government is using choppers with heat sensors to scour the land for invasive fire ants. Video.

In the weeks leading up to today's Saturn equinox, a possible moonlet punctured one of the planet's thin outer rings, creating a glittering structure unlike anything seen before.

The planet's low-frequency hum gets most intense when storm waves batter the west coasts of Europe and North and Central America, a new study says.

The Perseid meteor shower is more than a "geek pickup line." Even this year, when the moon's glare will present stiff competition, astronomers predict a dazzling show.