By 1490, Christopher Columbus believed that traveling 3,000 miles west from the west coast of the Iberian Peninsula would let him reach the eastern coasts of Asia.John Freely, Before Galileo: The Birth of Modern Science in Medieval Europe (2013), However, the 1492 enactment of that voyage brought his fleet to the Americas. The Magellan expedition (1519–1522), which was the first circumnavigation of the World, soundly demonstrated the sphericity of the Earth, and affirmed the original measurement of by Eratosthenes.
by 1490 christopher columbus believed that traveling 3000 miles west from the west coast of the iberian peninsula would let him reach the eastern coasts of asiajohn freely before galileo the birth of modern science in medieval europe (2013) however the 1492 enactment of that voyage brought his fleet to the americas the magellan expedition (1519–1522) which was the first circumnavigation of the world soundly demonstrated the sphericity of the earth and affirmed the original measurement of by eratosthenes