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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There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
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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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A comet's tail always points away from the sun.
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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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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
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