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  • price. Devices that are claimed to exhibit this behaviour are known as perpetual motion machines. The average person's knowledge of science (or lack thereof)...
    3 KB (314 words) - 10:29, 17 September 2013
  • changing hands at least 13 times between 1147 and 1482. Under the Treaty of Perpetual Peace agreed in 1502 by the English King Henry VII and the Scottish King...
    4 KB (450 words) - 13:56, 27 April 2012
  • All content is released under a free license. By making our content perpetually available for free redistribution and use, we hope to contribute to a...
    2 KB (0 words) - 22:20, 2 July 2007