The Indonesian amphibian may have evolved to respire through its skin as an adaptation to its cold, fast-moving stream habitat, a new study says.

Proteins in the reptiles' blood have been shown to kill drug resistant bacteria and even to partially destroy the virus that causes AIDS, researchers announced.

See a striking image of blood on ice, the Golden Gate gone dark, a "young" supernova, a robotic ship on the edge of space, and more.

Nanotechnology scientists are working to generate electricity from raindrops. Could it be the ultimate form of clean energy?

Wild octopuses engage in "jealous murders," gender bending, and once-in-a-lifetime sex, unlike their seemingly shy, unromantic captive brethren, a new study says.

It has a face like a plate and eyes like a human's. And it may signal a whole new family of fishes, one expert suggests.

Coprolites from Oregon date to 14,300 years ago—another blow to the Clovis-first theory that humans came to the New World via an ice-free corridor.

Tubular organisms that lived about 565 million years ago were found in positions that indicate they may have been the first animals to engage in sexual reproduction, researchers suggest.

In the small hilltop town of Torrita di Siena, they race a horse of a different color.

See photos from the April Fools' Day parody, including Paris Hilton gone wild. Though National Geographic helped with design, the magazine had no part in the satire's content.

The Harvard Lampoon had a little help from National Geographic itself—though the magazine had nothing to do with the Paris Hilton cover or any of the content.

A 31-mile-long (50-kilometer-long) layer of rock in northwest Scotland comes from a meteorite that crashed into Earth more than a billion years ago, experts say.

"It's ghostly. It's magic, " said an expert who heard the 1860 French recording of a human voice. The audio predates Edison's recording by 17 years.

Giant sea spiders, spine-crushing daggertooth fish, and pink "sea pigs" are just a sampling of exotic creatures hauled up by scientists during a recent Antarctic expedition.

Learn about the origin of April Fools' Day—a yearly ritual for pranksters to try out their best jokes—and how reality-based humor may get the last laugh.