Neil DeGrasse Tyson
, astrophysicist at the American Museum of Natural History, director of the Hayden Planetarium, host of NOVA scienceNOW
and author Death By Black Hole And Other Cosmic Quandaries
(W.W. Norton, 2006), talks about the space elevators and the universe.
Death By Black Hole And Other Cosmic Quandaries
is available for purchase at Amazon.com