The disappearance of the lower portion of a ship as it sails over the horizon is evidence that the world is round.

Question

Quizplus · Accepted Answer

This is due to the curvature of the Earth's surface, which causes the farther parts of an object to become gradually obscured from view as they move away from the observer's line of sight. If the Earth were flat, the entire ship would remain visible even as it moved further away.

The Disappearance of the Lower Portion of a Ship as It