The shortest distance between two points is a straight line. This is one of the basic principles of Euclidean geometry. But we live on a spherical Earth, so we cannot travel the straight line path ...

In our mind’s eye, the universe seems to go on forever. But using geometry we can explore a variety of three-dimensional shapes that offer alternatives to “ordinary” infinite space. When you gaze out ...

Tests taken by an Amazonian tribe indicate that children understand the basic principles of geometry without an education. Amazonian children in the Mundurucu tribe could solve basic problems with ...