Risks to Civilization, Humans, and Planet Earth

Various existential risks have the potential to destroy, or drastically restrict, human civilization; could cause human extinction; or even cause the end of Earth. Severe events could cause the extin...
Risks to Civilization, Humans, and Planet Earth - Wiki Article - http://wikiplays.org
Original @ http://en.wikipedia.org/wiki/Doomsday_event

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Image URL: http://en.wikipedia.org/wiki/File:X-risk_chart.jpg
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