Rather than a tracking tag telling scientists where this shark traveled, its violent removal let them observe an unexpected regeneration process. Josh Schellenberg

I set out to investigate where silky sharks travel − and by chance documented a shark’s amazing power to regenerate its sabotaged fin

After scientists’ GPS tracking tag was violently removed from one shark’s dorsal fin, they were in for a surprise: The wound didn’t just heal, but the missing tissue grew back.

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