A robot powered by a laser beam climbing into space is no longer wild science fiction -- engineers get one step closer to making it science fact.
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July 20 marks the 40th anniversary of Apollo 11's moon landing and Neil Armstrong's historic walk. Learn more about the Apollo missions and NASA's future lunar plans.
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You've seen ads for sports and other shows in high-definition television, and maybe a display at a store. But how is HDTV different from what you're used to, and when will it be standard? Find out. More
Contest Seeks Space Elevator
