Apes are larger, have fewer young and spend a longer time raising them, spend more time upright, and depend more on their eyes than on their noses. And unlike monkeys, apes do not have tails. But the most important difference is that apes are more intelligent than monkeys. Their brains are larger and more developed, and apes can learn and pass along information. Fast facts on gorillas, orangutans, chimpanzees, and bonobos, with profiles on the animals.

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