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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In 1859, the largest known geomagnetic storm struck the Caribbean, causing an aurora and telegraphs could even operate without a power source.
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It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
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More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
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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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Earth is the only planet in our solar system that's not named after a god or goddess.
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A single speck of dust is half way in size between a subatomic particle and the Earth.
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The North Atlantic gets 2.5 centimetres (1in) wider every year.
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