Chimpanzees cook, given the opportunity
Researchers gave chimps the chance to put raw slices of food in an "oven" which produced cooked food, and they did. So chimps can understand there is a transformation that takes place, they prefer the cooked food, and they can deal with 'delayed gratification. '
Very human behavior. Aldo note that the researchers are a married couple, and the woman "contributed equally", but she's barely mentioned.