The marble bust of the Roman emperor—possibly the oldest ever found—was discovered by divers in a French river.

The Sichuan quake's epicenter was practically pinpointed in a decade-long fault study, which warned last July that the region was ripe for a shock.

A decade after its discovery, scientists are struggling to pin down the properties of the "dark side" of gravity and unravel a mystery that accounts for about 74 percent of the universe.

Real-life rocket man Yves Rossy soared through the Alps this week on his first demonstration flight with a self-made flying contraption.

A magnitude 5.5 tremor set off landslides Friday near the epicenter of this week's massive quake, while the search for survivors took on an added urgency.

See "Fusion Man" fly via a jet-powered wing on his back, a giant beetle escape a smuggler, volcanic ash falling eerily, and more.

Short-finned pilot whales have been observed making high-speed chases after prey at great depths, the first time such behavior has been seen in deep-diving mammals.

The tree-dwelling creatures were put on a specially built treadmill of ropes and pulleys as part of new research into how much energy the animals expend.

Mars's ice caps are about five million years old, and its bedrock is puzzlingly cold and thick, reducing the boundary where liquid water may exist, a new study suggests.

Using a rope treadmill, researchers have revealed that tiny species use no more energy climbing vertically than they do walking on the ground, a find that bolsters theories about the earliest primates.

More than 400 racehorses—many of them in perfect health—are "destroyed" each year in the U.S. territory, where keeping losing or injured horses can be costly. Warning: graphic imagery.