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May 23, 2011 at 9:52 answer added Piotr Migdal timeline score: 2
May 23, 2011 at 3:12 history tweeted twitter.com/#!/StackPhysics/status/72500145903775744
May 22, 2011 at 19:21 history edited David Z
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May 22, 2011 at 17:40 history asked cosmologist CC BY-SA 3.0