NO MORE AURORAE, AND WE’D ALL BE ROASTED
On spherical Earth, the swirling molten metal surrounding our iron core generates electric currents, which in turn create our protective magnetic field, curving around the planet from one pole to the other. But on a flat Earth, without a solid core generating a magnetic field, we would lose our protective layer, called the magnetosphere. Charged particles from the Sun would no longer interact with our magnetosphere to create incredible auroral light shows. Though the absence of aurorae would be the least of our worries, as Earth would no longer be protected from the solar wind. We’d be bombarded with harmful solar radiation that could strip Earth of its protective atmosphere, leaving a barren world akin to our neighbour, Mars.