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Human ancestors probably lost their tails 25 million years ago — and a strange ‘jumping gene’ may explain why
The human tailbone looks identical across individuals, another hint that other mutations may be involved in its development.
A single genetic tweak caused human ancestors to lose their tails 25 million years ago — but it came at a cost
Human fetuses start growing a tail in the womb, but after about eight weeks they lose it leaving behind only the coccyx, a ...
BBC6y
Eight surprising facts about human evolution
yet ours appear to be getting crowded out as the human jaw gets smaller with a soft diet. However sometimes evolution finds a good use for vestigial organs. The coccyx or tailbone, formerly used ...