The newfound species suggests that the marine creatures have existed for at least a hundred million years longer than previously believed, a new study says.

Fish farms currently provide sustainable populations of fish for eating, but fish raised in open-net farms can spread disease and parasites to wild fish.

A previously unknown squirrel-size species from Tanzania is the world's biggest elephant shrew, scientists say.

Cross River gorillas have been spotted hurling grass and tree branches at invaders, including humans—something never before seen in the wild, scientists say.

A hen in a small Mexican village has become a celebrity—it lays eggs with green shells. A chicken's genes determines its shell color.

The first wearable lens embedded with nano-size circuitry was unveiled this month and may one day be able to overlay displays on a person's field of view, researchers say.

An international group of scientists has started a two-month voyage to Antarctica's northern coast as part of an ongoing program to catalog and study the world's ocean life.

The lizards' famous color trick did not develop as camouflage to hide from predators as previously suspected, a new study says.

Almost half of the dogs rescued from the football star's estate are being trained for new lives as loving pets at a no-kill facility in Utah.

Some of the dogs confiscated during a police raid on property owned by NFL quarterback Michael Vick have been placed in a new home in Utah, where they are undergoing rehabilitation.

The suspected carcinogens were reported in the animals' fat, but experts say a direct link between the chemicals and the devils' mysterious facial cancer is unlikely.

Microbes immune to commonly used antibiotics have been found inside birds in remote tundra, a new study says, a sign that resistance has spread deep into nature.

A female leatherback sea turtle made the longest recorded migration of any sea vertebate—just to reach prime jellyfish feeding grounds off Oregon.

Dozens of critically endangered gharials have been found dead recently along the banks of one of the few unpolluted Indian rivers, officials announced this week.

Large predators raised in captivity and reintroduced into their natural habitat have only a one-in-three chance of surviving, according to a new study.