Close up of one of Koko”s feet resting on a colorful sheet. Because gorillas have opposable thumbs on their feet as well as on their hands, theoretically they can be more discriminating about movie reviews.
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Photographer: Penny Patterson
Source: Gary Stanley
![](https://www.koko.org/wp-content/uploads/2010/03/PP_040101_IMG_1593_foot.jpg)