Hi I am Rick from the west burbs of Chicago. Single no kids
DontNeedChrist: If the Earth were flat, the sun's rays would always come in at the same angle, meaning that the USA, Australia, Italy, and Argentina would all experience the seasons the same exact way. Please explain this.
DontNeedChrist: Why are cruise ships navigated by a GPS satellite system that's based on a CURVATURE using 24 satellites?
On June 19, 240 BCE, Eratosthenes of Cyrene measured the shadow angle of a sundial in Alexandria, Egypt. From this measurement, he estimated the CIRCUMFERENCE of the Earth with surprising accuracy.