Wisdom teeth arrive by the time you're in your twenties. Average life span of our prehistoric ancestors is estimated around 35 years. I've read that a major contribution to mortality was our teeth wearing out and us not getting a second pair. As for life span, maximum human life span hasn't changed in recorded history. Maybe by a few percent, from 105 to 110. Average life span has increased a great deal, but despite all our advances in science & medicine, age limits haven't changed. Why this is is subject to a great deal of debate and research, and at the moment, is probably outside of our ability to change. Hard to lengthen telomeres, reduce oxidative stress from respiration, and make immortal stem cells that don't turn into cancer with our current knowledge of molecular biology.