Although the Earth looks ‘fl at’ to us when we are on its surface, and people believed it was fl at until quite recently, we have accumulated an enormous amount of evidence in the last few hundred...

Although the Earth looks ‘fl at’ to us when we are on its surface, and people believed it was fl at until quite recently, we have accumulated an enormous amount of evidence in the last few hundred years that it is roughly spherical. We can watch ships disappear over the horizon; ships and planes navigate successfully on the assumption that the world is roughly spherical; and more recently we even have pictures taken from space which show that the Earth is spherical. So it must be roughly spherical.