A fossil find in Kentucky’s Mammoth Cave just rewrote what we know about ancient sharks. Scientists uncovered a never-before-seen species, Macadens olsoni, with a jaw full of teeth arranged in a way no other shark has ever shown—just one row on each side and three big teeth up front. This little predator, less than a foot long, likely snacked on mollusks and worms 340 million years ago. It’s wild to think such unique creatures once swam where we now walk underground. What other surprises might be hiding beneath our feet? #Science #MammothCave #FossilDiscovery