Smart scientists have now proven that time goes faster at higher elevations.  

That may be hard to wrap your head around — it's not that the perception of time goes faster at higher elevations, it's that time itself actually goes faster at higher elevations.

In other words, if you have a super accurate clock and you leave it downstairs for several years, it will read X.  But if you had taken that very same clock and left it upstairs, it would show a slightly different time after the same amount of (downstairs) years.  Milli-milli-milli-milli seconds of difference, but a difference nevertheless.  Actually, 90 billionths of a second over a 79-year span is the difference.

Also, time slows when when you're moving.

So basically, if you want to live longer, walk through a valley of mud.