Curses! Yes, you caught me -- I am behind the conspiracy to keep flat Earth hidden. Me and my fellow lizardmen have been at it for several millenia. We created NASA, too.
But all is now lost, as I--and we--have been uncovered.
EDIT: Falsus in uno, falsus in omnibus is not exactly widely used anymore. Kinda like not many believe in a flat Earth anymore! Nor that space flight is impossible. Get with the program, Jerry!