Get the Popular Science daily newsletter💡 Breakthroughs, discoveries, and DIY tips sent every weekday. While this might not seem like much, chimps eat so much fruit (around 10 percent of their body mass every day! The chimps consume these gargantuan amounts of fruit throughout the full day and don’t seem to get intoxicated, Maro explained in a statement. “These cousins of ours are thought to still live a similar lifestyle to our remote ancestors,” Maro explains. “So there is good reason to think this ecological dynamic involving fruit alcohol among chimpanzees today also applied to our early ancestors.”Studying fruit preference in wild chimpanzees, however, is exceedingly difficult.