Einstein's theory works on a human scale: the higher you are, the faster you age
"And if you were to spend your life at the top of the 102-storey Empire State Building (1250 feet), you would lose 104 millionths of a second [in a lifetime]."
No really, I do find it interesting. But not life-changing
I already knew this. Its been known for a long time. Robert A Heinlein wrote a story involving this: "Time for Stars"
Secondly, if you are interested. Paul Davies talks about this in the Mind of God and Paul Davies is a better read than the telegraph.