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How It Is Made
Atmospheric homes of elves and sprites revealed
Buzz Aldrin Interview
What Will Happen to the Earth When the Sun Dies?
George Smoot: The design of the universe
At Serious Play 2008, astrophysicist George Smoot shows stunning new images from deep-space surveys, and prods us to ponder how the cosmos -- with its giant webs of dark matter and mysterious gaping voids -- got built this way.