[ExI] Black hole brains (was Re: taxonomy for fermi paradox fans)

John Clark johnkclark at gmail.com
Tue Feb 24 03:41:46 UTC 2015

To give a idea of the Planck length where the Beckenstein bound becomes
important, if the fingernail on your little finger was enlarged to the size
of the entire observable universe then the Planck length would be as long
as your fingernail was before the expansion.

 John K Clark
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