Here are some leading theories about the why the human brain has been getting smaller since the Stone Age. ... The more I learn, the more baffled I become that news of our shrinking brain has been so underplayed, not just in the media but among scientists. read more
The brain has become more efficient and most likely let go of some functions that are not useful for us. In the stone age, our hearing and our sense of smell were most likely better than they are today. We needed improved senses for hunting and survival. read more
“Since the Bronze Age, the brain shrank a lot more than you would expect based on the decrease in body size,” Hawks reports. “For a brain as small as that found in the average European male today, the body would have to shrink to the size of a pygmy” to maintain proportional scaling. read more