SciShow Explains Why Certain Animals Have the Biological Ability To Re-Grow Missing Limbs

Hank Green from SciShow explains why certain animals have the biological ability to re-grow missing limbs and why others (like humans) can’t.

Starfish can regrow lost arms, and salamanders can sprout new limbs. So why can’t we? Sci Show explains the science of regeneration, and explores the limitations the humans face — and are trying to go beyond.

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