It always amazes me how things we think of as high-tech modern innovations were often known by people a long time ago. There have always been ingenious people, and sometimes they achieved things long before I would have thought it possible. Archimedes almost invented calculus thousands of years ago, and the Greeks knew the distance to the moon and sun[1]. A little ingenuity can figure something out from simple principles; always a reminder that each person in history were living, breathing, thinking people as real as you and I, with a unique viewpoint and achievements. 1. [https://en.wikipedia.org/wiki/On_the_Sizes_and_Distances_(Ar...]