Added: 30-04-2011 12:36:20

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Thanks to the amazing special effects, travel time from the origin of the universe, the Big Bang to today. We also know the terrible story of Hypatia, a martyr of science who lived many centuries ago in Alexandria. Finally, Dr. Sagan will talk about nuclear war and the duty of man is to survive, not for our species, but the Cosmos, to whom we owe our lives.

Tags: Sagan Cosmos Alexander Hypatia Knowledge Mathematicians

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