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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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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The last time that the Sun was in its current position in space around the Milky Way, dinosaurs ruled the Earth.
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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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The ashes of the man who discovered Pluto are currently en route to dwarf planet, scheduled to arrive on the 14th of July, 2015.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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