In captivity the apes tailor their gestures to help humans understand their desires, a new study suggests.

Some areas of Zimbabwe have nearly been wiped clean of wildlife—a disastrous effect of a highly controversial land-seizure program—a new study finds.

Fossils of tiny fish that lived 420 million years ago have given scientists the earliest insight yet into how vertebrates developed tooth-bearing jawbones.

Four rare apes were shot in Africa's Virunga park on July 22. Get up close with other Virunga gorillas as rangers patrol the park to prevent another tragedy.

Sorry, horror movie fans. There is no longer enough oxygen in the air to support the bird- and person-size insects that roamed Earth 300 million years ago.

A unique kind of underwater vacuum has helped stop an invasion of an exotic algae, which is smothering Hawaii's native corals and grasses.

See a roundup of the week's news and events: England experiences worst flood in 60 years, Thirty Years' War skeletons unearthed, and more.

An influx of voracious jumbo squid in Pacific U.S. waters coincides with a decline in hake, a commercial species used to make imitation crab and fish sticks, a new study reports.

See pictures of clarion angelfish, Indian star tortoises and other animals that were confiscated at Los Angeles airport.

For Antarctica's penguins, the global-warming plot thickens: Some species seem to be adapting to the heat, while others are experiencing a foreboding population decline.

Smuggled wildlife seized by federal agents in Los Angeles has increased—and the list often reads like a who's who of the world's most exotic animals.

Photos: Exotic Animals Rescued at Airport

The recently unearthed remains of the prehistoric mammal include a pair of massive tusks, the longest of which stretches 16.4 feet (5 meters) long.

Chinese paddlefish have not been seen in the Yangtze River since 2003 and are likely on the path to extinction, scientists warn. (Second in a series on the megafishes)

See pictures of the world's biggest freshwater fishes, including a bear-size catfish and a half-ton stingray.

The three-year project aims to document the world's largest freshwater fishes, from giant catfish to half-ton stingrays. (First in a new series on megafishes.)

Photos: Meet the Megafishes