Geek Group founder Chris Boden (right) works with Michael Borzkowski on what they hope will be the world's largest Newton's Cradle — perhaps better known in smaller form as the desktop toy known as balance balls. Lis Bokt/The Geek Group hide caption

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Employee Raul Quecada places a "No Sale" sign on a used Toyota vehicle at a Toyota dealership in Alhambra, Calif., on Jan. 27, one day after Toyota Motor Corp. announced it would halt sales of some of its top-selling models to fix gas pedals that could stick and cause unintended acceleration. Nick Ut/AP hide caption

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The space shuttle Discovery orbits in space in a March, 2009 mission. The nearly 30-year-old space shuttle program is set to end in 2010. After five more missions, NASA's three shuttles — the Discovery, Atlantis and Endeavour – will be retired. Courtesy NASA hide caption

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