Like most primates, Koko is sensitive about her weight. Here she is standing on a scale while Penny reads the results. Koko knows that to control her weight, she has to watch both her caloric (ie, food) intake and her activity levels. Fortunately she has a dedicated team of produce workers who can help her with the caloric part – and interacting with Ndume helps with the other part.
How much do I weigh; do I have to look?
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Photographer: Ron Cohn
Source: Gary Stanley