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flag Wild chimps in Uganda regularly eat fermented fruit, consuming alcohol equivalent to one to two human drinks daily, research shows.

flag Wild chimpanzees in Uganda’s Kibale National Park regularly consume alcohol from fermented fruits, with urine tests from 20 chimps showing ethanol metabolites in 17, equivalent to one to two standard human drinks daily. flag Researchers, including Aleksey Maro of UC Berkeley, used improvised tools to collect samples, confirming that alcohol intake is a natural part of their diet. flag The findings support the “drunken monkey” hypothesis, suggesting human alcohol preference may have evolutionary roots in ancestral primate diets. flag Males and adult females tested positive more often than juveniles or females in estrus, possibly due to competition for fermented fruit. flag The study highlights that alcohol consumption is widespread among wild primates and may play a role in primate behavior and evolution.

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