An Internet guide to the universe
A device that renders objects truly invisible may be commonplace within the next few decades.
Fifty years ago this month, the U.S.S.R. launched Sputnik 1, the world's first Earth-orbiting artificial satellite. Shocked into action, the U.S. ramped up its space program—and its science education.
By clearing out vegetation, wildfires increase the vulnerability of soils to erosion and flooding.
Global fires may have doomed dinosaurs and much other life after giant meteorite struck Earth 66 million years ago
There's more to a mountain than the summit.
Two years after its big quake, Christchurch is still trembling.