The shape of Earth

[downbeatplumb]

Premis: We don't know what shape Earth actually is.

Persuade me, do you know the shape of this realm? 

Can you stretch the line across it an measure it for me?

Regardless of your position, any non-God fearing person should embrace the challenge of proving their knowledge of something as foundational as the ground we stand upon.

We have a number of ways of telling the shape of the earth.
1: We have a working physics that says that a body the size of the earth should be a sphere because of gravity.
2: we can observe other bodies of a similar size and see that they are spheres.
3: we have photos and videos from space showing the earth as a sphere.
4: from ancient times they were able to work not only that the earth was a sphere but were able to work out approximately how big a sphere. They did this by finding a well tha the sun shone directly down, at exactly the same time they measured the shadow on sticks to the east and west of the well on flat ground. by measuring the shadow they could work out the angle that world was tilted by and extrapolated the circumference.

So we do know what shape the world is.