Could you please name one useful invention that is based on flatearth technology? It's not the map because no one uses it to navigate.
Could you please name one useful invention that is based on flatearth technology? It's not the map because no one uses it to navigate.
All technology is Flat Earth technology.
Not hardly. Nothing that exists and is used today relies on the earth being flat. I can tell you something that only works if the earth is a spinning sphere though. Have you heard of a Foucault pendulum? It was invented in the 1800 and you could build one yourself to test out the spin of the earth if you wanted.
https://en.wikipedia.org/wiki/Foucault_pendulum