In the last 7 years, humanity has discovered 43 potentially habitable planets.
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MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
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On Titan, Saturn's largest moon, the atmosphere is so thick and the gravity so low that humans could fly through it by flapping "wings" attached to their arms.
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If two pieces of metal touch in space, they become permanently stuck together.
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