These 'Fossilized Brains' Might Not Be Brains At All

The transcript discusses the discovery of fossilized tissues in ancient arthropods, initially thought to be brain and nervous system tissues. A new study suggests these are actually biofilms, challenging previous evolutionary hypotheses. The study of brine shrimp decay supports this biofilm theory. Additionally, a reevaluation of ichthyosaur fossils suggests they might have been larger than previously thought, potentially rivaling the blue whale as the largest animal ever.

What new insight or understanding did you gain from this video?