“In a supersonic jet, you'll land before you take off. Your watch - if it's working right - will go back. (It'll stop if it's not). You've made a journey forwards and backwards at the same time. The trip will… — Zdeněk Mahler Copy Share Image
“In a supersonic jet, you'll land before you take off. Your watch - if it's working right - will go back. (It'll stop if… — Zdeněk Mahler Copy Share Image
