It is amazing to think that the earth is flat. So the pictures from space must be gross fabrications then and the earth's curvature when looking at the horizon from a great distances is an optical illusion?

It's just your imagination - if you would be a flat-earther, you wouldn't see any curvature.

The fact that we experience day and night in different times in different places is just the coin flipping?

The sun goes too far away and it becomes dark.

I don't understand.

Neither do I - but actually there are people here on Steemit that believes in the flat-earth-dogma.

I've made two posts on this subject:

• Round earth theory vs flat earth theory
• The sinking ship effect and the flat earth theory

There are so may conspiracy theories out there ... and for many of them it can be quite difficult arguing against ... but not so with the flat earth, anyone ought to be able to see with their own eyes that the round earth theory is a more useful theory. I believe that's a good exercise in school: "use scientific methods to find out if the earth is flat or round".