The cover of Apollo 11 moonwalker Buzz Aldrin's book "Mission to Mars: My Vision for Space Exploration" and a still from a video preview. The book lays out Aldrin's plan to land humans on Mars by ... more 
The cover of Apollo 11 moonwalker Buzz Aldrin's book "Mission to Mars: My Vision for Space Exploration" and a still from a video preview. The book lays out Aldrin's plan to land humans on Mars by 2035. less 
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SPACE.com | Photo By National Geographic Books
Wed, May 8, 2013 6:48 PM EDT