In the last 7 years, humanity has discovered 43 potentially habitable planets.
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According to a study by the National Science Foundation, only half of Americans believe in evolution, and one in 4 don't know that the Earth orbits the Sun.
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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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Pluto is smaller than Russia.
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Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
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The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
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The center of the galaxy tastes like raspberries and smells like rum, according to astronomers.
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