Why do some people believe the Earth is flat, when sailors, scientists, and satellites have treated it as a globe for so long? We trace the modern flat Earth idea from 19th-century writers to today's online communities, explain why the ground looks flat from where we stand, and walk through evidence anyone can check: Earth's round shadow on the Moon, changing stars with latitude, and the horizon. Calm and evidence-based, without mockery.
This episode includes AI-generated content.