Death, it's a part of life. Anyone especially over 60 is already pushing it. Each year they live is extremely lucky for them.
Humans were only designed to live up to 40 years old but with all of our advancements we have been able to elevate that to 60.
Next on the chopping block is John McAfee (currently 70).
It's an optimistic estimate of how long a mouth breather COULD live if he took care of himself (ie not obese, doesn't smoke/drink). But on average don't expect most people to make it past 60 even in 1st world countries.
are you sure?