here is a argument flat earthers can think about:
so flat earthers say: the earth is flat and the atmosphere stays a sphere or it is a shell in top of the earth disk.
so can that theory be true?
if you start to think about it. the distance in the middel of the "disk" (earth) to space is much larger dan on the side of the "disk".
but the atmosphere is about 30km on average from a round earth to outer space.
but that can't be true because if you would launch a rocket from the middel of the "disk" and on the side of the "disk" the time it would take to get to space would be the same.
en why does nasa mostly launch there rockets on the middel of the sphere?
not because they like to because they want the shortest way possible to save fuel.
so that theory can't be true.
that is why the planet earth is a sphere like all planets, galaxies and the whole observable universe.
and even de tinyest parts of apace like atoms they always will always form in a sphere.
because of charges that let the atom stick together and that always wil be spherical
that is a rule of physics. that also counts for plants in there way but with a other force called gravity that keep the mass together otherwise it would scatter in to space.
and gravity is not fake and I have an argument for that to:
gravity is part of the 5th dimension. light is also part of it. and you can't tell me that light is fake.
so the conclusion is that every base part is spherical because it pulls the mass to the middel no "matter" (hehe) what. that is only the case if something is a liquid ( such as water tention) of it has a big enough gravitational pull.