Stuart_Armstrong comments on Mini advent calendar of Xrisks: nanotechnology

Stuart_Armstrong 5 Dec 2012 18:51 UTC
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You’re half right !

The missing one is an xrisk that’s been around for a long, long time.
- 6 Dec 2012 0:21 UTC
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  Giant space rocks?
  - Stuart_Armstrong 6 Dec 2012 13:40 UTC
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    Nope! Not enough of the big ones around currently.