One of my favorite activities is going to the zoo where I live in Knoxville when it first opens and the animals are most active. On one recent weekend, I headed to the chimpanzees first. Their ...

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A biological anthropologist explains why humans can't wiggle their toes in the same way they can wiggle their fingers. When you purchase through links on our site, we may earn an affiliate commission.

University of Tennessee provides funding as a member of The Conversation US. One of my favorite activities is going to the zoo where I live in Knoxville when it first opens and the animals are most ...