An artistic conception of the Jupiter-like exoplanet, 51 Eridani b, seen in the near-infrared light that shows the hot layers deep in its atmosphere glowing through clouds. Danielle Futselaar & Franck Marchis, SETI Institute hide caption

itoggle caption Danielle Futselaar & Franck Marchis, SETI Institute

A new study shows energy output from 200,000 galaxies is half what it was billions of years ago. It's further evidence the universe is slowly declining. This undated NASA Hubble Space Telescope image shows the spiral galaxy NGC 1512 captured in all wavelengths from ultraviolet to infrared. Kevin Dietsch/UPI/Landov hide caption

itoggle caption Kevin Dietsch/UPI/Landov

It took astronauts 33 days to grow enough red romaine lettuce to make a small salad. NASA hide caption

itoggle caption NASA

A photo released by Virgin Galactic shows a badly injured SpaceShipTwo pilot Peter Siebold drifting under his parachute after last October's accident that destroyed the spacecraft during a test flight. Mark Greenberg/Virgin Galactic hide caption

itoggle caption Mark Greenberg/Virgin Galactic

Star Trek's Mr. Spock and Captain Kirk never even lose pocket change when they use a transporter to get from TV's Starship Enterprise to distant worlds. What gives? Paramount Television/The Kobal Collection hide caption

itoggle caption Paramount Television/The Kobal Collection