 Those of you who are pet owners, sometimes you'll see your dog has an upset stomach or something, and they'll go and they'll eat some grass, and then they'll barf it up. It's almost like they know what to do. You get some chlorophyll in their system to detox. Well, it turns out that sick chimpanzees seek out a range of plants with medicinal properties. Chimpanzees with wounds or gut infections seem to add unusual plants to their diet, and they even leave...