I have long believed that any American general or senior diplomat who wants to work in Iraq should have to pass a test. It would be a very simple test. It would consist of only one question: "Do you ...

Why is a straight line always the shortest path between two points? 📐 This video explains the result using a variational approach, showing how minimizing distance leads naturally to a straight line ...

A straight line may be the shortest distance between two points, but on a steep slope, zigzagging is the fastest way to go, a new study confirms. On flat terrain, a straight line is typically still ...