This article reminded me of true atomic wristwatches [0]. If precision gets good enough one day, you could get a synced pair and give one to a friend and compar

This article reminded me of true atomic wristwatches [0]. If precision gets good enough one day, you could get a synced pair and give one to a friend and compare after the years who has relativistically aged faster :) [0] https://www.hodinkee.com/articles/richard-hoptroffs-atomic-watch-prototype-combines https://www.hodinkee.com/articles/richard-hoptroffs-atomic-w...