Extinction of larger animals led to the human brain doubling in size around 30,000 years ago
The extinction of large animals led to the human brain growing, a new study reveals. When humans first emerged in Africa 2.6 million years ago the average animal size was more than 1,000 pounds, making them easy prey. Throughout the Pleistocene era, creatures’ sizes decreased by 90 percent, which forced our ancient ancestors to developing … Read more