Earth is the only planet in our solar system that's not named after a god or goddess.
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One pinhead of the sun's energy is enough to kill a person at a distance of 160 kilometers.
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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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From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
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