1) Chimpanzees in Guinea have learned to ferment palm sap into an alcoholic drink by chewing leaves to create sponges to soak up and drink the sap. The alcohol content ranges from 3.1% to 6.9%, enough to have observable effects on the chimps. 2) Researchers observed drinking sessions starting as early as 7am, with males and females partaking equally. About half the chimps observed did not drink at all, while others drank heavily, with one male observed swinging agitatedly from tree to tree for an hour after a session. 3) On average, drinking chimpanzees consume about 85ml of palm sap alcohol in a session, equivalent to three