A 150-million-year-old fossil of Archaeopteryx, long considered the oldest bird, may put to rest any scientific doubt that dinosaurs gave rise to modern birds.

Poultry vaccines can prevent healthy chickens from contracting deadly strains of avian influenza, Dutch researchers report.

The wild reservoir of the deadly Ebola virus has been traced to three fruit bat species in central Africa, scientists say.

A new study suggests that having too many males of one species could lead to more sexual aggression toward females and spur extinction.

Tracks of a human-size water scorpion discovered in Scotland offer the first evidence that the giant creatures walked on land, scientists say.

Normally cautious mice can be turned into daredevils by removing a gene in their brain that regulates fear, a new study has found.

Learn how a Singapore zoo is providing an "insurance policy" for the survival of the highly endangered proboscis monkey.

New research into the tusks of mammoths is shedding light on what the giant animals ate, how long they nursed, and someday, scientists hope, why they vanished.

Some warblers in Europe are canceling their annual winter breaks in Africa, opting instead to fly to Britain for the holidays.

A fossilized lizard found near Dallas, Texas, 16 years ago is a missing link in the evolution of swimming reptiles, a new study says.

For some types of herring, flatulence might be a way to "talk" undetected by predators. Watch and listen to this unusual form of communication.

Residents of two new Canberra, Australia, suburbs can keep cats only if the felines stay confined to homes and backyards, according to proposed regulations.

A scientist had to think fast when he found himself in a particularly bad spot: caught in the jaws of an anaconda. Learn the surprising technique for escaping the bite of this reptilian predator.

Shining in flat-screen TVs, brake lights, and other electronics, high-efficient LEDs are hot things in high tech. But nature has had their like for millions of years, a new study says.

It's a showdown between two of the world's most dangerous desert hunters: a red-tailed hawk and a diamondback rattlesnake. Who will win this battle of the predators?