I'm really curious as to when and to whom we can attribute the first inkling of the idea that if the sun is rising here maybe it's setting somewhere else far away. I'm not talking about the concept of timezones, which is a man-made construct. I am talking about the realization that not every part of the earth is experiencing the same time of day as you and when that was first realized, how, by whom, and what the ramifications of it were in history. Thank you!