Hi, I discovered that when i returned to the main menu and went back into the game i hadn't lost all my previous play! (thank god!)
I get your point about dinosaurs with shorter life spans, but when you're in the previous play on Isla Nublar you just want to get the job done and not take time investigating each dino's benefits?
Not to mention, I didn't have any dying of old age under my watch when I played it on my latest attempt. On Nublar North, on one previous attempt, I had at least one dinosaur die when I wasn't even half-way through that part of the campaign.
But, when I decided to restart the map, and despite going longer than that other attempt of mine,
nothing has ever died of old age that time. So old age is a randomizing occurrence. But, it will
always be around the amount of their life expectancy.