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Tycho
on May 21, 2013
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If a mathematician wants to cross a road
If you're crossing the road and there's traffic coming, should you walk diagonally away from the oncoming cars, or walk straight across (perpandicular to the pavement)?
benjoffe
on May 21, 2013
[–]
http://en.wikipedia.org/wiki/Negative_index_metamaterials
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