It appears that chimps in Guinea may have a substance abuse problem. There alcoholic beverage of choice? Fermented palm sap and they use a leafy spoon to get it and apparently these booze loving chimps get it a lot! Researchers observed chimps in west Africa over a 17 year period and noted their addiction to the sappy fermentation and these chimps regularly partook of the alcoholic substance often in large quantities. The sap has an alcohol content about the same as a good strong ale.
You might not have heard of it but there is something called the “Drunken Monkey Hypothesis” which postulates that the human attraction to alcohol may come from dependence of primate ancestors on ripe and fermenting fruits. In this 2015 study chimps were observed not only drinking large amounts of the fermented sap but also displaying obvious signs of being DRUNK! These chimps seem to prefer getting drunk during the day and sleeping at night and I bet they sleep well. 🙂
The study may help us to better understand the development of alcoholism in humans better. It has been suggested that apes and ancient humans developed an addiction to the sugar found in ripe and over ripped fruits. Addiction to the sugar content in alcohol is one of the theories for alcoholism in humans. But this sugar addiction also has other implications such as obesity especially in humans.