Watch geometer/topologist Caleb Ashley explain the parallel postulate on Numberphile.
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Parallel postulate not proven after all – paper retracted as having “no scientific content”
A paper published in the January 2010 issue of Computers & Mathematics with Applications which, according to Times Higher Education, “used unspecified computer ‘magnification technology’ to provide the first proof of a Euclidean axiom called the ‘parallel postulate'”, has been withdrawn by the publisher.