Primal Spirits: New Research Explores the Evolutionary Roots of Alcohol Consumption in Great Apes

To collect urine samples, they constructed a simple tool using forked sticks and plastic bags that functioned like a shallow collection vessel. The long handles of the tool allowed them to stay out of the "splash zone." Maro would wait under trees where the chimpanzees were feeding, as these animals typically urinate before leaving a feeding site.