The two curled, tusklike teeth of the male beaked whale evolved to attract females as well as to battle other males, according to new research.

Biologists literally give fish a bath to try and eliminate parasites in the sea near a coral reef in the U.S. Virgin Islands.

See National Geographic News's most popular individual photos of 2008, including pictures of a giant stingray, a "smiling" sky, a lizard-snake standoff, and more.

An "unexpected," 20-foot-long new dinosaur has been discovered in South America, rewriting the evolutionary history of raptors, a new study says.

In remote corners, a research team is monitoring contact between humans and wild animals--particularly wild animal meat--in hopes of stopping pandemics before they start.

Elephants in one of central Africa's remaining wildlife strongholds may vanish within the next two to three years if poaching continues at recent levels, according to conservationists.

Nearly 3,700 World War II shipwrecks lie submerged in the Pacific, some containing oil, chemicals, and unexploded ordnance. Concern about corrosion is prompting increased investigation.

Recently found ceremonial relics add to what we know about Arawakan Indian populations that Christopher Columbus encountered during his first voyage to the New World.

Lonesome George, the last giant tortoise of his kind, has failed to reproduce. Eggs laid by companion females were not fertilized.

Some pre-Hispanic cultures in South America built elaborate celebration sites at their cemeteries, complete with feasting and drinking grounds, according to a new archaeological study.

The white sturgeon, North America's largest freshwater fish, has bounced back in the Fraser River thanks to an unprecedented volunteer effort. Updated with video.

Growing up to 20 feet (6 meters) long, western North America's rare white sturgeon, is getting a boost from an alliance of officials, anglers, conservationists, and American Indians.

Stone tools found in Ethiopia, likely crafted by the earliest Homo sapiens, have been dated to at least 276,000 years ago—80,000 years before our earliest relatives were thought to roam Africa.

Nearly 3,700 World War II shipwrecks lie submerged in the Pacific Ocean, some containing noxious cargo including oil, diesel, gasoline, chemicals, and even unexploded ordnance.