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
Four-year-old Tai Shan, aka "Butterstick," is traveling from Washington, D.C., to China on Thursday as part of an agreement between the National Zoo and the China Wildlife Conservation Association. The panda will be bred in an effort to reintroduce the species into the wild.
Mehgan Murphy/National Zoo
Ahmed Wali Karzai, shown here in October 2009 during an interview with The Associated Press in Kandahar, is battling allegations that he has participated in illegally taking possession of land and water rights in the southern Afghan province. The theft of both private and public lands is a growing problem in Afghanistan.
Trucks carrying goods from Iran to Iraq queue for inspection about 90 miles from the southeastern Iraqi city of Amara. These days, Iraqi truckers face more delays than mortal danger while working, but life remains a challenge.
Essam al-Sudani/AFP/Getty Images
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.
Coronal loops, seen here, are fountains of multimillion-degree gas in the atmosphere of the sun. They are often precursors to solar flares, which emit strong bursts of electromagnetic energy.