by Javier Pereira
One of the first things we learn in school about geometry (more specifically, plane geometry) is that the shortest distance between two points is a straight line. Obvious, right? And yet…
The fact is, this obvious truism is only true in two dimensions, as on a flat map, which is how we usually think of the world. But when it comes to spherical geometry – and, unless you’re a Flat Earther, our planet is more or less a sphere – that’s simply not the case.
If you’ve ever tried to fla
