Stephen Hawking Says Humanity Won't Survive Without Leaving Earth | Space - discu.eu

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Stephen Hawking says that humanity has 200 years to leave Earth http://www.space.com/8924-stephen-hawking-humanity-won-survive-leaving-earth.html 2115 comments 25/2/2015 space

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Space.com: NASA, Space Exploration and Astronomy News https://space.com 152 comments
Ideas Are Immortal - Big Think http://bigthink.com/ideas/21570 136 comments

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