Studying cephalopods may illuminate the evolution of brains of all sorts

http://www.economist.com/news/science-and-technology/21660955-studying-cephalopods-may-illuminate-evolution-brains-all-sorts-tentacles

Blind cave fish evolved a shrunken brain to save energy

http://www.theguardian.com/science/neurophilosophy/2015/sep/11/blind-cave-fish-evolved-an-energy-saving-shrunken-brain?CMP=share_btn_tw

Ancient ancestor of humans with tiny brain discovered

http://www.sciencedaily.com/releases/2015/09/150910084610.htm