Koko the gorilla, whose remarkable sign-language ability and motherly attachment to pet cats helped change the world’s views about the intelligence of animals and their capacity for empathy, has died at 46. Koko was taught sign language from an early age as a scientific test subject and eventually learned more than 1,000 words, a vocabulary similar to that of a human toddler. She became a celebrity who played with the likes of William Shatner, Sting, Leonardo DiCaprio, Robin Williams and Mr. Rog

Koko the gorilla mastered sign language, raised kittens and even once playfully tried on Robin Williams' glasses. Here's a look back at her life: http://nbcbay.com/X9DkMR5 | NBC Bay Area

872K views · 17K reactions | Gorilla knows human sign  #wildlife #orangutans #gorillalove #gorilla #reelsviralシ | Tagob Reel | Facebook

Even Santa knows sign language! #santa #signlanguage #partner | Somedeafguy

189K views · 4K reactions | Koko's Kitten Playdate... In this...

1.7K views · 45 reactions | [Video] Koko the Gorilla Celebrates Her Birthday with Adorable Kittens—[Full story in cᴑmments] | Nature and Wildlife TV | Facebook

886 reactions · 282 shares | This incredible gorilla used sign language to ask for the perfect birthday present: A box of kittens. Watch Koko and her unlikely friends hit it off in this clip from The Lift: America's First Mobile Morning Show.. | The Weather Channel | Facebook