Science

2 space rocks hours apart point up the danger
A space rock even bigger than the meteor that exploded like an atom bomb over Russia could drop out of the sky unannounced at any time and wreak havoc on a city. And Hollywood to the contrary, there isn't much the world's scientists and generals can do about it. But some former astronauts want to give the world a fighting chance.
A meteor exploded in the sky above Russia's Ural Mountains on Friday, causing a shockwave that blew out countless windows and injured more than a thousand people.
A 150-foot asteroid hurtled through Earth's backyard Friday, coming within an incredible 17,150 miles and making the closest known flyby for a rock of its size. In a chilling coincidence, a meteor exploded above Russia just hours before the asteroid zoomed past the planet.
A Russian health official says nearly 1,000 people have sought help for injuries caused by a meteor that exploded in the sky, blasting out countless windows.
Video: Meteor crashes to Earth in Russia; nearly 1,000 injured
A meteor that scientists estimate weighed 10 tons streaked at supersonic speed over Russia's Ural Mountains on Friday, setting off blasts that injured some 1,000 people and frightened countless more.
The BBC looks at sex, from humans to seaweeds, and why a mystery bug two billion years ago invented sexual reproduction.
An earthquake was detected Tuesday in North Korea just north of a site where the country has conducted nuclear tests. Neither Pyongyang nor Seoul confirmed whether the tremor resulted from a widely anticipated third nuclear test, though an analyst in Seoul said a nuclear detonation was a "high possibility."
The U.S. is vulnerable to cyberattacks that could shut down financial services or destroy information that companies need for daily operations, the chairman of the House Intelligence Committee said Sunday.
Want to name Pluto's two tiniest moons? Then you'll need to dig deep into mythology.
Curiosity rover completes 1st drill into Mars rock
In a Mars first, the Curiosity rover drilled into a rock and prepared to dump an aspirin-sized pinch of powder into its onboard laboratories for closer inspection.