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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A comet's tail always points away from the sun.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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If NASA sent birds into space they would soon die; they need gravity to swallow.
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Scientists have confirmed that Enceladus, one of Saturn’s moons, has a watery ocean.
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When a massive power outage struck southern California in the 1990s, Los Angeles residents reportedly called 911 to express alarm about strange clouds hovering overhead; they were seeing the Milky Way for the first time.
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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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