Fish Fins and Fingers: A Surprising Cellular Connection

Millions of years ago our ocean-dwelling ancestors stepped forth onto new shores and began populating Earth’s dry land.

Fossils such as Tiktaalik, one of the most compelling members of the class of transitional “lobe-finned fishes”, mark the evolutionary path that led to land-bound animals. The transition from delicate fins to sturdy limbs didn’t happen all at once, but it is clear that our appendages are distant cousins of fish fins.

Using cutting-edge DNA mapping techniques, research

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