As I understand it, humans did not evolved on this planet. Human life was put on Earth with genetics modification like shorter lifespan and limitation to his intelligence/psychic abilities. Earth humans body were designed to be prisonners/slave body.
About the extension of human lifespan, there is some stuff somebody can do :
1) Caloric restriction.
2) Vitamins supplementation.
3) Fasting, intermittent fasting, OMAD.
4) Increase NAD+ level in body with Nicotinamide Riboside/Nicotinamide mononucleotide.
5) Exercice regularly.
6) Avoid sunburns or high frequency radiation.