Scientists have traced the origin of fingers and toes to fish-like creatures that roamed the seas 380 million years ago, according to a new study. The findings, published in the British-based science journal Nature, upend the prevailing theory on the evolution of digits.
The hand and the foot emerge from pre-existing bits of the fin skeleton that were just reshaped, rather than being entirely new bits that were bolted onto the existing fin skeleton.
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