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Since having (eg.) two arms is a result of evolution, how can we, considering modern technology, force embryos to grow another limb? Polymelia is known to me, but it is considered a birth defect. I...
Since having (eg.) two arms is a result of evolution, how can we, considering modern technology, force embryos to grow another limb? Polymelia is known to me, but it is considered a birth defect. I...