Scotland's head of state unveiled the largest challenge prize to date for spurring advances in marine renewable energy, part of a bid to combat climate change.

The first dig in the inner circle in 44 years aims to find a specific date for Stonehenge's founding.

See the earliest known gold necklace created in the Western Hemisphere?found in a burial site near Lake Titicaca in Peru.

Scotland plans to award 10 million pounds (about 20 million U.S. dollars) for the first viable technology to harness the sea's energy for electricity.

People were asked to stay away from the Australian city's center. Elsewhere sand and wind were blamed for road accidents and at least one death.

With many frog species dying off, Australian zoos are joining a global network to breed the amphibians?including tiny, striking specimens.

An embryonic planet still inside a "womb of gas" has been discovered?and it's set to grow up into a giant, scientists report.

Coprolites from Oregon date to 14,300 years ago?another blow to the Clovis-first theory that humans came to the New World via an ice-free corridor.

An ancient Aztec system of arithmetic, including symbols of hearts, hands, and arrows, has been deciphered, revealing a painfully meticulous tax code perhaps familiar to many today.

It has a face like a plate and eyes like a human's. And it may signal a whole new family of fishes, one expert suggests.

Tiny changes to the length of days on Earth may be due to a mineral in the deep Earth that conducts electricity at high rates, a new study says.

The rare Asiatic lion cub born at a Japanese zoo is one of only about 300 left in the world.