" In the 8th Century, the Greek philosopher Homer thought that the Earth was flat. Many of the less educated people in the 15th Century still held on to that concept when Columbus set sail, following the setting sun west. The less informed warned Columbus and his crew of the danger of sailing right off the edge of the Earth. However, navigators and mathematicians knew better, since Greek philosophers in the 5th Century such as Parmenides, Empedocles and Pythagoras had already proved, by using various scientific methods, that the Earth was round. In about 200 BC Eratosthenes, who lived along the Nile near Alexandria, Egypt, calculated the circumference of the Earth to within a very close tolerance. Later in Prussia, Copernicus presented his concept that the Sun was the center of the Solar system and theorized that the planets revolved around it.
It was not coincidental that Copernicus did this shortly after Columbus discovered the new continent. Although the ancients did not have radio and television, they could communicate by various means, and definitely knew what was going on. However there were those who remained superstitious, believing that there were monstrous sea creatures near the edge of the Earth. But Columbus and other relatively educated people knew better! "

― Hank Bracker