Why is Koko signing “gorilla” to the viewmaster?

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Photographer: Ron Cohn

Source: gary stanley

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Koko is looking through her new blue ViewMaster (remember the old red one) at a selection of photos of various animals. When Penny asks Koko what she”s looking at, Koko signs “gorilla” (chest pounding with both hands), and Penny discovers that that is exactly what Koko is looking at – another gorilla.