Question

How do circum navigation is a proof for the shape of earth ?

Answer 1

Answer:

Many ancient cultures throughout history considered the world to be flat, with depictions including a floating in the ocean. Although it was not widely accepted until the 16th century, the Greek philosopher, Pythagoras, was thought to be the first to suggest the world was round in the 6th century BC.

In 1494, at a time where many educated circles still remained in doubt over the curvature of the earth, the Treaty of Tordesillas was signed by Pope Alexander VI. This divided the world in half, with the Americas and surrounding islands being promised to the Kingdom of Spain and sovereignty of the eastern hemisphere handed to the Portuguese.

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