Wildlife, wilderness, and culture collide on this multi-day walking experience on a little-known island in Tasmania.

Excavations on unpromising mounds in the Iraqi desert revealed Sumer’s earliest city. Surviving relics and a rebuilt temple have given experts more clues about the ancient metropolis of Eridu.

Together, surface and deepwater currents form the “global conveyor belt,” which circulates seawater over a 1,000-year journey ...

Scientists believe that the motion of Earth's continents through plate tectonics has been largely steady over millions of years. New research, however, suggests this drift can speed up or slow down ...