science

I'll have to wait and see which side of the family I take after. Not counting accidents and other premature bucket-kicking events, one half has a few who didn't make it to 60, the other tends to get almost to the triple digits before keeling over.

I'd put the differences down to environment and lifestyle for the most part though, got some heavy drinkers and heavier eaters among our early departures and at least one cancer linked to a hazardous chemical exposure. Might not kill you right away unless you drown/choke/melt but it's enough to knock a few decades off the lifespan.