Mongolia, the host of this year's U.N. World Environment Day, is home to Earth's rarest bear. Conservationists hope 2013 will mark the beginning of its comeback.
Winners from the 2013 Annual Underwater Photography Contest held by the University of Miami Rosenstiel School of Marine & Atmospheric Science epitomize the beautiful diversity of the open oceans.
Scheduled to launch from the Wallops Flight Facility, the rocket carries instruments to study when the first stars and galaxies formed in the universe and how brightly they burned their nuclear fuel.