Astronaut Hadfield shares 'unbeatable point of inspiration'
Clip: 11/20/2013 | 8m 48s
Col. Chris Hadfield captured the world's curiosity when he tweeted videos of everyday life on the space station and covered David Bowie's song "Space Oddity." Science correspondent Miles O'Brien talks to the retired Canadian astronaut, author of "An Astronauts Guide to Life on Earth," about the importance of space exploration.
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