Mars had an oxygen-rich atmosphere around 4 billion years ago
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In outer space there exists a gigantic cloud of alcohol which can be used to produce 400 trillion trillion pints of beer.
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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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Saturn's rings are about 500,000 miles in circumference but only about a foot thick.
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An organisation called Mars One is planning to establish a permanent colony of humans on Mars by 2023.
9
There are approximately 3,500 astronomers in the U.S. - but over 15,000 astrologers.
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