National Geographic reports on a study that shows primates choose wood that’s most durable and weavable…and discuss if their sleep habits may have impacted human evolution.

Chimpanzees choose tree branches that give them the most firm and stable place to sleep, a new study says.

What’s more, the research bolsters the theory that high-quality sleep may have led to the evolution of modern humans, said study leader David Samson, an anthropologist at the University of Nevada, Las Vegas.