The shortest distance between two points is always a straight line, but only in Euclidean geometry.

What is this? It’s a geometry that is usually taught in school, where figures are two-dimensional and presented on a flat surface like a sheet of paper.

In real life, on the surface of the Earth, the shortest distance traveled is a curve called a geodesic.

That’s because (unfortunately for flat-earthers) our planet is not flat!

On the map, the cities of New York and Moscow were used as references.