[IncRnd]

That Wikipedia page can be edited by any visitor, therefore it is not a reliable authority on the posted information. Take a look at the revision history page for your link, https://en.wikipedia.org/w/index.php?title=Myth_of_the_flat_.... Half of the edits appear not to be attributed to people but to unnamed ip addresses.

i.e. Don't believe everything you read.

To illustrate this point, go to different Wikipedia page that shows the opposite of what you wrote, https://en.wikipedia.org/wiki/Flat_Earth and look at the Early Middle Ages of Europe, https://en.wikipedia.org/wiki/Flat_Earth#Europe:_Early_Middl....

[KSteffensen]

So what would you consider a reliable source? How much time are you willing to put into evaluating your source?

Pretty much anything on the internet is written by random people, all of whom could be great authorities on the subject or complete crackpots.

A couple more sources on the Myth of the Flat Earth, written by random people on the internet and found by a google search:

[0] : https://www.discovery.org/v/the-flat-earth-myth/

[1] : https://jameshannam.com/flatearth.htm

[2] : https://journals.sagepub.com/doi/abs/10.1177/003172170708800...

[3] : https://wtamu.edu/~cbaird/sq/2012/12/20/why-did-so-many-peop...