"When and Why Did Human Brains Decrease in Size 3,000 Years Ago?" https://neurosciencenews.com/evolution-human-brain-collective-intelligence-19524/ https://neur

"When and Why Did Human Brains Decrease in Size 3,000 Years Ago?" https://neurosciencenews.com/evolution-human-brain-collective-intelligence-19524/ https://neurosciencenews.com/evolution-human-brain-collectiv... Coincidence? ;) "the brain shrinkage parallels the expansion of collective intelligence in human societies." It looks like we are due for another brain shrinkage.