The Earth is round. It may seem like an obvious fact that we’ve understood since primary school, but for a body of “Flat Earthers,” the concept of a globe-shaped Earth is paramount to what they claim is the biggest conspiracy theory ever to exist. Their science is laughable, their evidence baseless and their claims prone to falling flat — pun intended — but that hasn’t stopped Flat Earthers from devoting a lot of effort to a cause that lacks dimension.