Bringing the balky "big bang machine" another step closer to full power, physicists now have two beams of protons stable and circulating though the Large Hadron Collider's main ring.

Dr. Horrible, take note: A light-sensitive chemical fed to tiny worms called nematodes caused the creatures to "freeze" when zapped with ultraviolet light, a new study says.

Blue-green ooze in Hawaii and crunchy golden crusts in New Mexico are among newfound mats of microbial waste that could offer clues in the search for extraterrestrial life, scientists say.

Five ancient crocodile ancestors, two previously unknown, have been uncovered in the Sahara by a National Geographic researcher and his team. The most imposing, BoarCroc, was 20 feet long with triple fangs and likely could have taken down a dinosaur.

So the moon has water, we now know. But how did it get there? Scientists have three key theories—and one wild one.

Uncovering another link between chimpanzees and humans, a new study found chimps gesture mainly with their right hands. This indicates the chimp brain's left side is used in communication, as in people.Video

"I'd be shocked if no life existed on Europa," one scientist says—and provocative new research suggests the moon's seas have enough oxygen for fishlike animals.

During the 2009 Leonids, a "strong outburst" should produce up to 300 shooting stars an hour, depending on whether you're in the right place to see Tuesday's showy peak before dawn, experts predict.

It's official: There's water on the moon—and a "significant amount" of it too, members of NASA's recent moon-crash mission, LCROSS, announced Friday.

It's official: There's water on the moon—and a "significant amount" of it too, members of NASA's recent moon-crash mission, LCROSS, announced today.

During this year's Leonids, you may see anywhere from 30 to 300 shooting stars an hour, depending on whether you're in the right place to see the showy peak on November 17, experts predict.

It's official: There's water on the moon—and a "significant amount" of it too, members of NASA's recent moon-crash mission, LCROSS, announced today.

By tweaking a single gene, scientists have made Hobbie-J the smartest rat in the world. The technique might make humans smarter too—maybe too smart.

A new dinosaur unearthed in South Africa has given scientists a glimpse into the evolution of sauropods, the biggest animals ever to have walked the Earth, a new study says. Video.

Sunlike stars that harbor planets are low on lithium, according to a recent study that may offer a new tool in the hunt for planets beyond our solar system.