Scientists Discover 319-Million-Year-Old Fossilized Brain

A very long time ago, a fish died, was buried in sediments and eventually became fossilized. Today, 319 million years later, it's the star of a study that reveals "the oldest example of a well-preserved vertebrate brain." 
University of Michigan doctoral student Rodrigo Figueroa led the study, published in the journal Nature on Wednesday. The small fish is Coccocephalus wildi, a type of ray-finned fish. Living examples of ray-finned fish include swordfish and trout. It's a diverse group made up of about 30,000 species.
Scientists Discover 319-Million-Year-Old Fossilized Brain