I have an obsessive interest in Neanderthals and read news about them all the time. The contradictory theories about them are hilarious. Some say Neanderthals were brilliant and advanced, Neanderthals more advanced than previously thought: They innovated, adapted like modern humans, research shows
. Some say they were dim-witted. The latest theory was that their big eyes used up too much brain power, making them too stupid to keep on surviving: BBC News - Neanderthal large eyes 'caused their demise'