An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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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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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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Tidal forces between the Earth and Moon are slowing the Earth down and pushing the Moon further away.
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There is a mysterious and loud radio signal known as 'the space roar' that has yet to be explained.
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