@wellerstein What's in a word, "critical"? Who chose that word to describe a novel phenomenon, which underlies a critical moment in history?
73 years ago today: CP-1, the world's first nuclear reactor, goes critical at the University of Chicago.pic.twitter.com/Y3Z27Rhkig
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@IEEEhistory Ah, I have written on this!http://blog.nuclearsecrecy.com/2015/04/10/critical-mass/ … -
@wellerstein Aha, a critique of critical!#GoogleNgram shows "critical mass" has astrophysical origins in 1880s http://bit.ly/1LPJHd8
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@wellerstein The ABQ national nuclear science Museum has a Lego model and an original graphite block from CP1pic.twitter.com/U3T4JFxtH7
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@wellerstein happy chain-reacting pile day!Thanks. Twitter will use this to make your timeline better. UndoUndo
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@wellerstein@bat__go and we still don't quite understand how graphite behaves... ;-) -
@GNeighbour@wellerstein that's just to keep you busy...!!
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@wellerstein Think of the (graphite) pencils that gave their all for science!Thanks. Twitter will use this to make your timeline better. UndoUndo
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