Dangerous skull surgery was commonly and successfully performed among the Inca, likely as a treatment for head injuries suffered during combat, a new study finds.

The magnitude 7.8 temblor also trapped nearly 900 students under the rubble of their school in Sichuan Province, state media reported.

Hundreds of schoolchildren are trapped under the rubble and thousands are dead after a massive earthquake shook China's Sichuan province on Monday.

Poisonous chemicals trapped for decades in ice are now seeping into the polar ecosystem via glacial meltwater, researchers report.

See a supercell light up the Texas sky, U.S. Marines braving a sandstorm in Afghanistan, the Olympic torch reach the top of Mount Everest, and more.