How might the world end? Stephen Petranek lays out the challenges that face us in the drive to preserve the human race. Will we be wiped out by an asteroid? Eco-collapse? How about a particle collider gone wild?
When he was editor-in-chief of Discover magazine, Stephen Petranek tangled with questions as big as the universe. Here he confronts the biggest question on the planet.
http://www.ted.com/talks/stephen_petranek_counts_down_to_armageddon.html
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