PHOTOS & VIDEOS

1. SLIDE SHOW
   

   Mars On Earth

   Scientists in the Utah desert are trying to find out if humans would be able to survive on Mars. For two weeks, the researchers have limited amounts of oxygen, water, food and...
2. VIDEO
   

   Kepler Space Mission

   A NASA team talks about the Kepler mission to discover planets
3. VIDEO
   

   Too Much Stuff

   A team of researchers from UCLA study the possessions of American families
4. SLIDE SHOW
   

   Russia's Meteor

   View photos from the effects of a a 10-ton meteor that exploded several miles over Russia on February 15

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