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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? 
It's real sad to me how all the other intelligent lifeforms on this planet are biologically limited in one way or another. Rats? Live a few years. Octopi? Live a few years. Dolphins? The fuck they gonna do with those flippers? Ravens? Ditto, but wings. They can't even masturbate. Humans hit the evolutionary jackpot.
what about the elephants?? they got brains and those cool trunks
True, no opposable thumbs, though. Perhaps they could develop some kind of written language, but I don't think it'd be nearly as easy as it is for us and I doubt they'd be able to do much with complex tools.