Boozy chimps fail urine test, confirm hotly debated theory

The urine of chimpanzees contains high levels of alcohol byproduct, most likely because the chimps regularly gorge themselves on fermented fruit, according to a new paper published in the journal Biology Letters. It's the latest evidence in support of a hotly debated theory regarding the evolutionary origins of human fondness for alcohol.

As previously reported, in 2014, University of California, Berkeley (UCB) biologist Robert Dudley wrote a book called The Drunken Monkey: Why We Drink and Abuse Alcohol.