The world has done a tremendous job of extending the human timeline over the past two centuries. From an average life expectancy of 40 in 1800, we’re now up to 67 years globally, with a high of nearly 83 years in Japan. At the same time, more years spent in school and the postponement of marriage, procreation, and even “growing up” means we’re pushing the limits of youth ever further.

Full story at Prosumer