The makers of Hemisphere believe this is first catamaran superyacht to hit the water and could revolutionize the way people think about sailing.

CNN: A peek inside world's largest luxury catamaran

Images taken by the orbiting NASA's Mars Global Surveyor spacecraft enabled scientists to detect changes in the walls of two craters in the southern hemisphere of Mars, apparently caused by the downhill flow of water in the past few years.

CNN: Life on Mars?

The sea ice expanded during Southern Hemisphere autumn and winter in response to the development of a fresh, cool surface water layer, which floated on the denser, warmer salty sea water below.

BBC: Melt may explain Antarctica's sea ice expansion