From: Amazing Monkeys
»The Americas
Why Spider Monkeys Only Have Four Fingers
Unlike virtually every other primate, spider monkeys have no thumbs, which could snag on the branches. Instead, their four long fingers form a perfect hook to help them swing on branches.
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More About This episode
Our quest to track primates' astonishing rise to power leads us to the Americas, the final continents to be colonized by man's closest relatives. Join us as we reveal the incredible journey a group of monkeys took to get here from Africa 35 million years ago. We then come face-to-face with some of the new branch of primates, who adapted to this environment in weird and wonderful ways, including spider monkeys, capuchins, and the king of the primates: humans.
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