Before revision: 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.
After revision: 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.