World's oldest preserved brain found in prehistoric fish, study finds
A UoB representative said soft tissues like brains normally decay quickly and "very rarely fossilise", but when this fish died, it was "probably quickly buried in sediments with little oxygen present" as such environments "can slow the decomposition of soft body parts".
They added that the research team had not been looking for a brain when examining the skull fossil, but found the distinct object which had features found in vertebrate brains, such as bilateral symmetry and hollow spaces.Scans of the fossil revealed a brain and cranial nerves, researchers said
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