![the-first-predators-and-their-self-repairing-teeth](https://utterbuzz.com/wp-content/uploads/2019/05/the-first-predators-and-their-self-repairing-teeth-640x191.jpg)
The earliest predators appeared on Earth 480 million years ago — and they even had teeth which were capable of repairing themselves. A team of palaeontologists have been able to discover more about how these organisms were able to grow and regenerate their teeth.