Artist Will Ryman poses for photographs next to his installation entitled “The Bed” at the Saatchi Gallery in Chelsea on January 7, 2008 in London, England. (Photo by Chris Jackson/Getty Images)
BERLIN, GERMANY - JANUARY 26: A video game joystick lies next to an exhibit at the Computer Game Museum (Computerspielemuseum) on January 26, 2011 in Berlin, Germany. The museum, which opened January 21, traces the evloution of computer games through approximately 300 exhibits. (Photo by Sean Gallup/Getty Images)
Google has built its first self-driving car prototypes and hopes to test hundreds more models this summer. If all goes well, the company is planning a pilot program in California over the next few years.
A woman runs through the early morning mist on Hampstead Heath on September 30, 2011 in London, England. Much of the UK is enjoying a spell of unseasonably hot weather which is expected to last into next week. (Photo by Dan Kitwood/Getty Images)
Tree houses, treehouses, or tree forts, are platforms or buildings constructed around, next to or among the trunk or branches of one or more mature trees while above ground level. Tree houses can be used for recreation, work space, habitation, observation or as temporary retreats.
A bodyboarder rides a wave at Mackenzies Bay on May 1, 2011 in Sydney, Australia. A strong east-south-east swell has developed along the NSW coastline with waves between 6ft and 8ft expected to hit the coast for much of the weekend and into next week. (Photo by Cameron Spencer/Getty Images)
A man stands next to his giant pumpkins as he waits for them to be weighed in at the 34th Annual Safeway World Championship Pumpkin Weigh-Off October 8, 2007 in Half Moon Bay, California. (Photo by Justin Sullivan/Getty Images)