You're probably familiar with Koko, the famous gorilla who knows sign language.

Whether it's her recent comments about climate change or the various times she's adopted kittens to raise as her own, Koko is one impressive ape — and a humbling example of just how humanlike the animal kingdom can be.

(She also has her fair share of vocal detractors, just like her human celebrity counterparts. Because apparently some people aren't impressed by a gorilla who can communicate with humans.)

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