Perfectly evenAfter 2000 years of searching we only know of 51 perfect numbers and they're all even. What else do and don't we know about these rare and precious jewels of maths?
Perfectly oddNobody has ever found an odd perfect number. So do they exist at all and, if yes, what do they look like?
A strange definition of perfectPerfect numbers have foxed mathematicians for over 2000 years. Here's a quick look at the long struggle to find them.
Metallic numbers: Beyond the golden ratioYou've heard of the golden ratio but have you heard of the silver ratio? And all its other cousins called the metallic numbers? Read this article to meet the family!
Less is more: The quest for minimal surfacesFor over 250 years minimal surfaces have been playing hide and seek with mathematicians. But what are they and why are they interesting?
The power of antsFind out how these humble animals have inspired computer algorithms to solve complex real-world problems.
Our changing picture of gravityTo celebrate the recent centenary of the first major test of Einstein's general theory of relativity, we look back over how our picture of gravity has changed.
