Koko the gorilla, who is said to have been able to communicate by using more than 1,000 hand signs, has died in California at the age of 46. Here she is on BBC News in 1985, with her kitten friend. | BBC Archive

2.7M views · 20K reactions | Robin Williams met Koko in 2001. It was a very cheerful encounter for both, and Koko has treasured it to this day. When Koko learned of Robin's passing (on Aug. 11, 2014) she became very sad. We hope this video will lift her spirit and remind everyone of the profound gift of joy that Robin Williams brought to our world. | Thinking Humanity | Facebook

425K views · 30K reactions | In 2001, Robin Williams met Koko the gorilla — a moment of pure, wordless connection between two extraordinary souls. Koko, mourning the loss of her companion, found joy again as Robin made her laugh, play, and even steal his glasses. Years later, when Robin passed, Koko mourned too, understanding her friend was gone. Their bond was a reminder that empathy knows no species — and that Robin’s kindness reached even beyond words. | Did You Catch This? | Facebook