That’s the upshot of a new study on the alcohol content of the preferred foods of one of our closest living relatives. The findings, published today in the journal Science Advances, may have implications for understanding human attraction to alcohol. Being able to find and eat fruit containing ethanol might have helped them get more calories because fruits with higher concentrations of ethanol tend to be riper, with a higher sugar content. The total would be higher if the chimps chose riper fruits with higher sugar content. Other mammals, including elephants and tree shrews, and some birds, such as Cedar Waxwings and hummingbirds, eat fermented fruit and nectar, which contain ethanol.