Harold Camping may have been exaggerating a bit when he said that the world would end on May 21 this year. But that hasn't stopped the radio preacher from making another Doomsday prediction, this time for Friday, Oct. 21.
Habitat destruction drives species extinct more slowly than previously thought, according to a new model described in this week's Nature. 'We have bought a little time for saving species,' says scientist.
Google challenged China censorship rules Tuesday – saying it would stop filtering its search engine results or leave the country – after it uncovered a vicious cyberattack on human rights activists.
Obama, who called the Great Wall 'magical,' leaves with new awareness of US-China interdependence – as well as differing priorities.
Many caribou herds have lost more than half their number from the maximums of recent decades.
Scientists look at why the numbers of caribou are declining.