A REALLY old fish
The oldest example of a well-preserved vertebrate brain was discovered in a Lancashire coal mine more than 100 years ago, it has been revealed.
READ MORE: Nicola Bulley: Business owner raised alarm over missing mum after finding her 'worried' dog wandering alone Senior author Dr Sam Giles, of the University of Birmingham, said: “This unexpected find of a three-dimensionally preserved vertebrate brain gives us a startling insight into the neural anatomy of ray-finned fish. It tells us a more complicated pattern of brain evolution than suggested by living species alone, allowing us to better define how and when present day bony fishes evolved.
Ray-finned fishes have backbones and fins supported by bony rods called rays. While soft tissues such as the brain normally decay quickly and very rarely fossilise, when this fish died, the brain was replaced during the fossilisation process with a dense mineral that preserved the three-dimensional structure of the soft tissue.
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