Tackling an ages-old puzzle, a French architect offers a new theory on how the Egyptians built the Great Pyramid at Giza
Native trout are returning to America's rivers and streams, thanks to new thinking by scientists and conservationists
The slaughter of four endangered mountain gorillas in war-ravaged Congo sparks conservationist action
Life on the Web
Long before global warming became a cause célà¨bre, Lonnie Thompson was extracting climate secrets from ancient glaciers
An ocean on Mars. An Earth-like planet light years away. The evidence is mounting, but are astronomers ready to say we're not alone?
Humans' two-legged gait evolved to save energy, new research says
Bundle up your power cords—wireless energy transfer is here
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