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There is conflicting evidence about this. It is fair to say that some of the ancient Egyptians realised the earth must be round while most of them believed it to be flat. The earliest known calculation of the earth's circumference was made by Eratosthenes, a Greek mathematician, around 240 BC.

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Why does the flat earth society think the earth is flat?

The majority of the members of the Flat Earth Society do not believe the Earth is flat. They are members because it's a counter-culture group which some people find interesting.Those who think the Earth is flat are usually motivated by religious literalism.


Which former president of the US believed that the earth was flat?

There is no evidence to suggest that any former president of the US believed that the earth was flat. The idea that the earth is flat has been widely discredited for centuries, and it is unlikely that any US president would have held such a belief.


Why did Ptolemy not need to be concerned about distortion from projections because his map was based on?

a flat Earth.


Why would there be no tides on a flat earth?

On a flat Earth, there would be no tides because the gravitational pull of the Moon and Sun would not affect water on a flat surface in the same way it does on a round Earth with oceans. Tides are a result of the gravitational forces between the Earth, Moon, and Sun interacting with the shape and mass distribution of the Earth.


World is really flat?

In early centuries they really believed that. Gallileo and the seafaring explorers proved it was true the world was not flat and you would not fall off it. Today we enjoy seeing the beauty of our round planet Earth from space cameras and from photos taken by the astronauts and the satellites. They are spectacular photos. NASA has a web site with some of those photos and videos. Go see them sometime.