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

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