Astronomer Percival Lowell believed that he was the first person to observe canals on Venus, but because of a faulty adjustment of the eyepiece on his telescope, he was in fact looking at the blood vessels in his own eye.
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MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
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If two pieces of metal touch in space, they become permanently stuck together.
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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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There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
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