Book 33, Question 101
How can you tell a monkey from an ape?
Monkeys and apes are both primates, but they have some clear differences.
Most monkeys have tails, and apes do not. Apes, like gorillas, orangutans, chimpanzees, and gibbons, are usually larger, have wider chests, and can swing their arms in big circles. Monkeys often walk on all fours along branches. Humans are apes too.