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Humans are born with tails—but lose them before birth—and scientists still don’t know why we have them at all
Early in pregnancy, something surprising happens. Every human embryo develops a tail. It is not symbolic or imagined. A real extension forms at the base of the spine, complete with vertebrae. Later, ...
Learn more about the gene linked to the evolutionary loss of human tails, and how, in rare cases, some people are still born with them. People born with a tail either have true tails or pseudo-tails.
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