The chimps are presented with different food puzzles each night before they settle down and make their nests. Volunteers placed peanuts and spoonfuls of peanut butter in cups and screwed them together in stacks. Burrito carefully unscrewed the cups from each other to find the treats but found it much easier to use his large, powerful canine teeth to rip off the lids – reminding us that an effective solution to a problem often looks different from a chimpanzee’s perspective.