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Apr 24, 2019 at 14:44 answer added DANIYAL timeline score: -4
Jan 19, 2012 at 8:08 answer added David Z timeline score: 23
Sep 23, 2011 at 22:01 history tweeted twitter.com/#!/StackPhysics/status/117358056483983361
Sep 23, 2011 at 19:21 history asked Karin CC BY-SA 3.0