Well, they say that if you can travel the #SpeedOfLight, you will experience #TimeDilution & your perception of time will slow down time per the theory of #SpecialRelativity but then, while your perception of your won't change significantly but everyone else not traveling w/you will age much faster than you do. You could also put your body in #Cyrostasis, not that that's even possible yet 🤷♂️
Did you ever watch the movie #Intersteller (2014)?
It will explain everything. LOL!!!😉
PS: I'm with you . . . I turn 75 & my grandchildren will turn 10 & 7 this year too. 😮