Prehistoric Baby Shark Teeth

Sharks have inhabited the world’s waters for 400 million years. A remarkable thought, given the fine preservation of their teeth in fossil form to this day. For these impressive remnants of prehistory we have to thank sandy sediment, which covered the teeth after the death of the shark, thereby preventing oxygen and destructive bacteria from reaching them. The fossilisation process then took place over a course of 10,000 years, as minerals in the sediment gradually replaced each tooth’s original dentine and enamel.