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60 bytes added ,  23:59, May 15, 2007
fix factual error
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'''John Dalton''' first proposed that all matter is composed of [[atom]]s.  He also proposed the ideas of [[element]]s and [[compound]]s.
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'''John Dalton''' proposed that all matter is composed of [[atom]]s.  He also proposed the ideas of [[element]]s and [[compound]]s.  He was the first since [[Democritus]] in ancient times to do so.
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