In the last 7 years, humanity has discovered 43 potentially habitable planets.
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The light hitting the earth right now is 30 thousand years old.
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If NASA sent birds into space they would soon die; they need gravity to swallow.
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Sound doesn't travel in space.
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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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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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