A single speck of dust is half way in size between a subatomic particle and the Earth.
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Nuclear power prevented an average of over 1.8 million deaths between 1971-2009 as a result of lower air pollution from reduced coal usage according to NASA.
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When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
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Scientists are now able to grow 'beating' heart tissue in a lab!
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Stephen Hawking once tried to find potential time travellers by throwing a party and only sending out invitations after the party.
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Only 12,000 years ago there was a species closely related to modern humans called Homo floresiensis that had been living on an Indonesian Island. They used fire and rather advanced tools, yet were only about 3 feet tall and weighed around 25kg.
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Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
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There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
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