See Proofs that the Earth is Spherical The Earth is spherical, and there is overwhelming evidence to support this fact.  From simple observations to complex scientific experiments, we have known for centuries that our planet is not flat. In this article, we will explore some of the most compelling proofs that the Earth is spherical. Proof 1: Ships disappear hull first over the horizon If the Earth were flat, we would be able to see entire ships disappear over the horizon. However, what we actually see is that ships disappear hull first, followed by the superstructure. This is because the Earth curves away from us as we move away from the shore. This can be easily observed by standing on a beach or cliff and watching a ship sail away. As the ship gets further away, it will appear to shrink and sink lower into the sea. Eventually, only the mast and sails will be visible, and then the ship will disappear completely. Proof 2: Lunar eclipses During a lunar eclipse, the Earth casts a shadow