If Humans Lived 400 Years, You'd Still Be a Teen at 80

What if humans lived for 400 years? Let's imagine that our lifespan could get over four times longer. That would be a long adventure! How would it effect out health and after how many years would we become teenagers? The more scientists learn about our age, the more questions arise. Let's answer some of them. Learn more about your ad choices. Visit megaphone.fm/adchoices