Research on fossilized fish from the late Devonian period, roughly 375 million years ago, details the evolution of fins as they began to transition into limbs fit for walking on land.

Tom Stewart holds a fossil cast of a fin from a juvenile Sauripterus taylori, a late Devonian fish
with primitive features of tetrapods [Credit: Matt Wood]The new study by paleontologists from the University of Chicago, published this week in the…

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Source: archeo