I’ve been interested in relativity for a long time – or at least it seems that way! – ever since the 1970s when Dr Walker drew a stickman following a stickwoman and flashing a torch at her on the blackboard in a maths lecture at Nottingham University. I’m pretty sure the theory was that if they were both travelling at the speed of light the woman would never be aware of her pursuer. Or something like that.
Anyway, according to this story on physorg.com:
[National Institute of Standards and Technology] physicists […] demonstrate[d] that you age faster when you stand just a couple of steps higher on a staircase
Similarly, the NIST researchers observed another aspect of relativity—that time passes more slowly when you move faster
I think that means that if I want to keep young, it’s time to stop sitting in front of the computer and go and run around doing the cleaning downstairs.