Brain evolution

Neurophilosophy reports on some half a billion year old brains foundpreserved in fool's gold.
Exceptionally well preserved 520-million-year-old arthropod brains overturn the old idea that nervous tissue does not fossilize, and provide fresh insights into brain evolution

 Fuxianhuia protensa specimen from the Chengjiang fossil beds in southwestern China. Photograph: Xiaoya Ma/ Natural History Museum