Sciences and tech
News About Military Technology Xi urges China to build up joint space and air power India's opposition rules out major change to nuke policy French test fire new cruise missile
Megafloods: What They Leave Behind South-central Idaho and the surface of Mars have an interesting geological feature in common: amphitheater-headed canyons. Researchers offer a plausible account that all these canyons were created by enormous floods. ... > full story Image Perception in the Blink of an Eye Imagine seeing a dozen pictures flash by in a fraction of a second. You might think it would be impossible to identify any images you see for such a short time.