A rat about five times the size of its city cousins and a possum described as "one of the world's smallest marsupials" were found during a recent expedition to the island of New Guinea.

Pink salmon in Canada's Broughton Archipelago might be extinct in four years due to aquaculture boosting the numbers of the natural parasites, a new study says.

From a mysterious meteor in Peru to a glowing deep-sea squid off Japan, find out which extraordinary finds from the past year struck a chord with our readers.

The intricately carved vase is giving experts a glimpse into ancient rituals that included food offerings, chocolate enemas, and hallucinations induced by vomiting.

Tibetan children and caged monkeys were among the subjects featured in winning shots from the 2007 Global Photography Contest.

There is such a thing as a free lunch for Hawaii's jack fish and sharks, which follow endangered Hawaiian monk seals as they hunt and then steal their prey.

Passengers arrive in Chile after escaping their sinking ship in the icy southern seas. All 154 aboard survived the accident.

The National Geographic Endeavor was the first ship on the scene after the cruise ship Explorer sank. National Geographic Society grantee Jon Bowermaster tells what he saw.

Exclusive new pictures show a 450-pound Mekong giant catfish. It's the only one caught this year—a bad sign, according to a scientist on the scene.

Vacuum, lawn mower—whatever you call it, Nigersaurus was bizarre. See a 500-tooth dinosaur whose secrets are coming to light.

Nigersaurus—an elephant-size dinosaur with a featherweight skull and a mouth that worked like a lawn mower—suggests that long-necked plant-eaters browsed like cows.

The world's largest trout, overfished to near-extinction in most of its habitat, is still thriving in Mongolia's remote rivers.

For the ferocious, cannibalistic taimen, one of the world's biggest freshwater fishes, Mongolia's remote rivers are its last hope. Part four in a series on "megafishes."

Fishing the world's largest trout, Mongolia's taimen, is encouraged—to help save it.

Children sacrificed by Inca rulers were fed high-quality food for up to a year, sent on a grueling march, and drugged before death, a new study shows.