Moonbuggy racing
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Nasa hosts moonbuggy race in Alabama

14 April 2012 Last updated at 22:08 BST

Teams from around the world have descended on Huntsville, Alabama for Nasa's annual Great Moonbuggy Race.

More than 500 high school and college students competing in human-powered vehicles were inspired by the lunar rovers that astronauts used on the moon.

They have to complete a half-mile race course - navigating obstacles on the way which are designed to simulate the surface of the moon - in the fastest time.

Diedra Williams, the Great Moonbuggy Race Project Manager, said the event was a learning experience as well as a fun one.