Pair of pants
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This article is about an object in hyperbolic geometry. For the article of clothing, see trousers.
So think about that next time you’re at the sewing machine, trying to patch your punctured spheres.
[Edit: “Trousers” is now the front page of the “Pair of pants” redirect, accessed April 2013]
 sciencemag.org article: physicists-discover-a-whopping.html