The trippy video you see above is the highest-resolution model yet of how carbon dioxide moves around the Earth's atmosphere.
One-fifth of the nation's high school students say they have smoked in the past 30 days, and nearly half of them admit to having experimented with smoking at least once in their lives, according to a new study from the Centers for Disease Control and Prevention.
The Philae probe is alive and well a day after the first successful spacecraft landing on a comet, but scientists are still trying to figure out exactly where it is on its new home.
A mobile laboratory the size of a washing machine made history Wednesday when it completed a slow-motion descent to the surface of a comet 311 million miles from Earth.
The countdown has begun. In less than 24 hours, the European Space Agency's Rosetta mission will attempt to put a laboratory on a comet.
Claudia Alexander has spent the last 15 years of her life waiting for this moment: landing a spacecraft the size of a washing machine on the surface of a speeding comet.