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If Humans Die Out, Octopuses Already Have the Chops to Build the Next Civilization, Scientist Claims
(www.popularmechanics.com)
Do we need to die for this to happen? 
There are sharks they’ve found that are 400 years old. I’m telling you, when sharks get larger brains and opposable thumbs, humans are done for.
Greenland sharks reach sexual maturity after 150 years. So it’s going to take a long ass time for evolution to do it’s thing.