In July 1994, astronomers around the world saw fragments of comet Shoemaker-Levy 9 slam into the planet Jupiter. It was incredible to watch and has led to important discoveries about the planet.
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If all the salt in the ocean could be removed and spread evenly over the Earth’s land surface it would form a layer more than 166 metres thick – about the height of a 40-storey building. Adam Smith discovers why the salt of the Earth is so important.
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NASA’s Kepler mission made some remarkable discoveries – Kepler-16b, 200 light years away and Kepler 22-b, a planet that may have the perfect conditions for life.
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