All primates climb and breathe in air. They have big brains and hands and hair. But. . . some live alone, some live in groups. One primate has a nose that droops. is an adorable picture book with a scientific—and child-friendly—underpinning. With examples of different primates for each description, as well as extensive backmatter explaining the fascinating science behind their behaviors, this bizarre book captures the wonders of our ecosystem.