An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
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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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41% of the moon is not visible from earth at any time.
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The earth rotates more slowly on its axis in March than in September.
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All of the Earth's continents are wider at the north than in the south - and nobody knows why.
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Summer on Uranus lasts for 21 years.
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The center of the galaxy tastes like raspberries and smells like rum, according to astronomers.
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