NASA Science News for Feb. 28, 2013
NASA's twin Van Allen Probes, launched just last August, have revealed a previously unknown third radiation belt around Earth.
FULL STORY: http://science.nasa.gov/science-news/science-at-nasa/2013/28feb_thirdbelt/ (http://science.nasa.gov/science-news/science-at-nasa/2013/28feb_thirdbelt/)