Re:Seems a little strange (Score 1)

Challenge accepted. It has been a few years since I had the class, but my psychology class used Psychology, 7th edition by David G. Myers. Chapter 4, The Developing Person, studies the psychology of humans as they go through life, and it includes a section on adolescence. As the AC who also replied to my post pointed out, 2-4 years earlier onset is conservative, but since I didn't have anything handy at 2 in the morning, I estimated. And the idea that people didn't live past their 20's is preposterous, as has been pointed out many other times in this thread.