There are more nerve cells in the human brain than there are stars in the Milky Way.
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The density of Saturn is so low that if you were to put it in a giant glass of water it would float.
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From the nitrogen in our DNA, to the calcium in our teeth, the iron in our blood, to the carbon in our apple pies - all were made in the interiors of collapsing stars; we're all made of stardust.
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An international team of astronomers has spotted the farthest known gravitational lens and, as Albert Einstein predicted, it is a galaxy that deflects and intensifies the light of a much further object.
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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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