The "remarkable," yard-long, horseshoe crab-like arthropods roamed in swarms of up to a thousand animals, a new study suggests.

The tiny humans from the island of Flores had no arches in their feet, an important trait for runners, according to a new analysis that says the 18,000-year-old fossils represent a unique species.

After a factory had found a 40-million-year-old whale fossil in a limestone kitchen counter, researchers investigated the stone's fossil-packed quarry, which could shed light on the origins of African wildlife. Video.

The fossils, which contain the only known extinct seahorse species, shed light on the mystery of how the poor swimmers were able to disperse across the globe, scientists say.

Three thousand years ago, a fortified city on Egypt's border was both a warning to invaders and an awe-inspiring gateway for travelers--as evidenced by newly revealed grand temples and rare cravings.

An isolated group of dinosaurs may have outlived their doomed relatives by as much as half a million years, a new study suggests.

The earliest known dinosaur soft tissue has been extracted from an 80-million-year-old duckbill, a new study says.

Swine flu started sweeping the globe, a unique Roman artifact was unearthed, and a baby gorilla was found in an animal trafficker's suitcase, as seen in this week's selection of the best news pictures.

A temple filled with broken metal, ivory carvings, and stone slabs engraved with a dead language could cast new light on the "dark age" that was thought to have engulfed the region from 1200 to 900 B.C.

The winged reptiles wouldn't have been able to flap fast enough to get off the ground or keep themselves airborne, says a new study of how modern birds soar.

Archaeologists in Egypt have found 53 rock tombs containing preserved mummies and painted coffins dating back as far as 4,000 years. Video.

Less clumsy on land than its modern relatives, the flipperless "missing link" is the first hard evidence of land origins for seals, sea lions, and walruses.

Legendary lovers Antony and Cleopatra may be buried in one of three chambers beneath an ancient Egyptian temple, say archaeologists who have found a telltale bust, mask, and coins.

New scans of an almost perfectly preserved baby mammoth indicate that the youngster was healthy and well fed before it died, researchers report.

Cleopatra and Marc Anthony are likely buried together in one of three sites at an ancient temple, archaeologists announced in Egypt Sunday. Digging starts next week. Video.