[caww]

.....”We're not all alike, and that's a good thing”......

Genetics plays a role too.....some families have histories of longevity - others might have members who suffer from heart issues at a young age. Also male and female differs as well as injuries that slow us down more than aging.

[Omnivore-Dan]

True. Environment and nutrition also. Some do well in arid climates others more humid, or cold vs. warmer or hot.