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This is Scientific Americans' 60-second science.

I'm Karen Hopkins. This will just take a minute.

Chimpanzees. They're much like us, genetically, anatomically, and as it turns out, cocktail logically, because we finally have solid evidence that chimps drink alcohol. So say researchers who've observed wild chimpanzees

throwback fermented treetep. The findings are served up in the Royal Society Journal, Open

Science. Some biologists think that the reason we humans like adult beverages is because our

primate ancestors were partial to super ripe fruits, which are high in calories and often in ethanol.

But there's one big problem with this so-called drunken monkey hypothesis.

Apes had not really been seen downing alcohol in the wild.

That is, until now.

The researchers were studying chimps in Basu West Africa.

In this region, people tap palm trees and

allow the collected sap to ferment in small plastic containers, which they cover with leaves to prevent

contamination. Turns out, for chimps who hanker hooch, the leaves are like the straw in a banana

dackery. The apes take the leaves, crumble them up, dip them in the sap, and then suck them dry.

The drinkers were mostly male, shockingly, accounting for 34 of the 51 bouts of boozing observed,

and they'd consume a couple liters of the fermented brew each time they bellied up to the bar,

...