I remember when Koko indepently put the two signs for "drink" and "fruit" together to communicate "watermelon." It was a monumental cognitive leap. 
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"To the question: 'Where do the animals go when they die?' Koko replied with three signs: 'Cozy - Cave - Goodbye'". Goodbye, Koko.
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This magnificent creature. Rest, sweet Koko.

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In honor of Koko, let’s all be nicer and share kind words with others.
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May Koko, such a kind soul, rest in peace.
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"The higher animals are in a sense drawn into Man when he loves them and makes them (as he does) much more nearly human than they would otherwise be."
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Goodbye sweet Koko
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A sad, sad, day.
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Koko, who understood around 2,000 words, never ceased to amaze me! I hope you rest well surrounded by kittens, Dame Koko.
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I believe that twice as many as the current US President
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When I watched the docu on Koko, & saw that she couldn’t have babies it made me so sad. But when they decided to allow her to adopt kittens, it was the most precious thing in the world. I cried w/her when she found out the one died. A sad day for all of us.
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