Humans have known for millennia that we live on the surface of a spherical planet. Why, then, is there a growing number of people who seem to think Earth is flat?
It turns out, believing Earth is flat requires throwing out our solid understanding of the way things like light, gravity, and perspective work. It also requires the wholesale denial of any images taken from space, as well as decades of firsthand accounts by humans who have circled the globe.
In this episode, host Abigail Bollenbach walks you through the earliest evidence to the most recent observations that prove why our planet Earth is not flat.