Stephen Petranek:
Cuenta regresiva de Stephen Petranek al Armagedón.

TED2002 · 29:42 · Filmed Feb 2002
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¿Cómo terminará el mundo? Stephen Petranek nos muestra los retos que enfrentamos en el esfuerzo por preservar la raza humana. ¿Seremos eliminados por un asteroide? ¿Un colapso ecológico? ¿Qué tal un acelerador de partículas fuera de control?

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: What are the 10 most likely ways that life on the Earth could end? Full bio
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