What was the last common ancestor of humans and apes like?

The closest living relatives of man are apes such as chimpanzees, gorillas, orangutans, and gibbons. We all had the same common ancestor who lived during the Miocene era (23 million to 5 million years ago). While scientists don’t have any remains of this mysterious creature, what would it have looked like?

In other words, what was the size of our last common ancestor (LCA), and what did its skull, brain, legs, arms, and even fingers look like, based on the available evidence?

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