Perfect numbers have foxed mathematicians for over 2000 years. Here's a quick look at the long struggle to find them.
This article explores how Euclid's ancient geometry interacts with all aspects of human thought and life.
Euclid's fourth axiom says that all right angles are equal. But isn't that obvious?
The famous mathematician Euclid is credited with being the first person to axiomatise the geometry of the world we live in - that is, to describe the geometric rules which govern it. Based on these axioms, he proved theorems - some of the earliest uses of proof in the history of mathematics.