1:57

Neil deGrasse Tyson: Earth Is Bad for Life

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2:40

Neil deGrasse Tyson - World to End In 2012...or Not

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4:47

Who's More Pro-Science, Republicans or Democrats? - Neil deGrasse Tyson

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5:34

Neil DeGrasse Tyson - Death By Black Hole

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5:08

Neil DeGrasse Tyson - How to Deflect a Killer Asteroid

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7:05

Neil DeGrasse Tyson - Death By Giant Meteor

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