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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The Sun and Moon appear to be the same size because the moon is 400 times smaller than the Sun, but 400 times closer to Earth.
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The light hitting the earth right now is 30 thousand years old.
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Pluto is smaller than Russia.
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The Space Shuttle main engine weighs 1/7th as much as a train engine but delivers as much horsepower as 39 locomotives.
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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
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