Brains that could 'predict' predators, and dangers in general, faster based on an 'educated' guess have obviously a higher survival rate. Or, to be precise, hav

Brains that could 'predict' predators, and dangers in general, faster based on an 'educated' guess have obviously a higher survival rate. Or, to be precise, have a higher chance of making little copies of themselves afterwards. Those naughty bunnies, there's nothing more sexy than the thrill to have survided... Increased energy efficiency is probably just a side effect. Allthough of course, energy optimized brains, being big energy sinks aren' that small a factor. But than again, brains back then didn't last that long before they were eaten by predators, so I still would think it is much more important not to be eaten than to be energy efficient. 'Premature optimization', 'Deliver fast' and all that. You know the drill.