Comment Re:The elephant in the room. (Score 1) 227
Neanderthals had slightly larger brains... but then if you look at dolphins you'll see that part of their large brain size is due to FAT to keep their brain temperature up-- because temp is a really HUGE factor on brain function. I enjoyed the Neanderthal connection and how it upset so many white people... (I'm white) and I will enjoy the discovery that Neanderthals were fat headed too.
Not long ago there was some scientists claiming high testosterone levels were damaging to evolution so it lowered and probably allowed more brain development. Neanderthals could have had high testosterone levels... Neanderthals are known to be anti-social with small groups while the humans had tribes and could work as a group (or some tradition kept their bones together and Neanderthals bones apart) - and before people were forced to accept the interbreeding science the thought was that Neanderthals didn't stand a chance.
Also large human brains require a lot of PROTEIN in the diet. So does muscle. It would seem to me as brains became more important the protein in the diet migrated. I remember reading something about our ape ancestors moving to more meat in the diet and how that was needed for brain size. It wasn't out of desperation.
Also when one reads the science it becomes rather clear (but not provable) that brains were tiny all the way to the top of the food chain and the only pressure would have been competition between packs of the plains apes (which date far before Neanderthals.) There wasn't a food shortage as much as too much demand. That would also encourage them to spread out over a wide range. Just think about the facts-- humans have little hair, sweat out their whole body's skin, run efficiently on two legs, and are the best distance runners in the whole animal kingdom. We didn't become best for nothing. We ran in packs after lions etc. until they over heated and then anything made easy kill. A Cheetah may be way faster but it can't go out of your sight and a pack of healthy humans can jog after it for 20 miles without rest... if the Cheetah can even make it that far in the heat (plus having thumbs, throwing sticks and rocks is likely. Chimps still throw things to deter/herd... they just can't chase and don't need to compete.) Humans use less energy and muscle to propel themselves great distances than probably any other land animal; again the evolutionary pressure of jogging explains most everything.