The world watched in astonishment last week as NASA delivered its one-ton Curiosity rover to the surface of Mars with astonishing precision, hitting a target area just 12 x 4 miles wide after eight ...

Dive into the most dramatic events in Earth’s 4.5-billion-year history, from its birth to the emergence of humanity. How did a hellscape of molten lava transform into a lush, green, watery planet ...