Shadows Beneath the Waves A 7,000-Year-Old Reef Reveals What Happens When Sharks Disappear

7,000-year-old Caribbean reefs reveal what modern ones have lost: sharks, large fish—and balance. Prey species flourished in their absence. Fossils help show what healthy reefs once looked like. #Paleoecology #ReefScience #Anthropocene #FossilReefs @pnas.org