IN A NUTSHELL 🦈 Researchers discovered that ancient armored fish from 465 million years ago had sensory structures similar to human dentine. 🔍 The study supports the “outside-in” hypothesis, suggesting teeth evolved from external sensory mechanisms found in ancient fish. 🦀 Evolutionary convergence was observed as both vertebrates and arthropods independently developed similar sensory organs … Continue reading This Prehistoric Armored Fish From 465 Million Years Ago Could Be the Key to Understanding Why Our Teeth Still Hurt