Water mountains are my new favorite concept
3 points
Yeah, nowadays most places where people usually see ships are so polluted that they can’t see them disappear. Also, ships are so large that you have to look a the details to notice them decreasing.
The same applies to the stars, people just can’t see them anymore, so they never notice them rotating. People also do not navigate by the Sun anymore.
People nowadays are so disconnected from Earth that they do indeed have no problem believing it’s flat.
