A Well-Preserved Brain

Scientists were excited, to find the world’s oldest brain. The brains and nerves were still preserved, in Stanleycaris herpix fossils found in Canada. The 8-inch-long prawn had 3 eyes, and swam in Cambrian oceans 500,000,000 years ago. They had claws with spines, circular jaws lined with teeth, and swim flaps lining its flexible body.