jacob_cannell comments on Resolving the Fermi Paradox: New Directions - Less Wrong

12 Post author: jacob_cannell 18 April 2015 06:00AM

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Comment author: jacob_cannell 19 April 2015 05:14:22AM 0 points [-]

The conditions for the chimp to human jump require a series of changes where each brain increase enables better language/tools that pays for the increased costs.

Parrots/birds don't seem to have a feasible path like that - light bodies designed for flight, lack of hands. Cetaceans can easily grow and support large brains but fire doesnt work under water and most tool potentials are limited. Elephants seem to be the most likely runner up, if primates weren't around - perhaps in a few tens of millions or hundreds of years there could have been a pachyderm civilization.

So yeah - it might be somewhat rare, but its hard to say, as it didn't take that long on earth.