If there is any truth to that Neandethal crap, then, depending upon the whether to the reference to maturity was in terms of prehistory lifeline or in terms of modern ones, then we would not become adults until 36 or 108 depending on the meaning I mentioned. We take a long time to grow either way. So that would also mean we would not pass our relative 30's until 60 or 180, mid life crisis until 90 or 270, retirement until 130 or 390, and average life would be 150 or 450. So even if there were any truth that theory it would not be all bad.