## Articles

To understand the why the cosmic microwave background tells us so much about the Universe, you first need to understand what created it: sound waves travelling through the early Universe.

Fully functioning invisibility cloaks are closer to becoming a reality than you might think. Here's a quick look at the maths and science involved in producing them.

How do you make a stealth aircraft that's invisible to radar? An area of maths called random matrix theory holds the answer.

Rock and its use for tools and buildings has shaped human civilisation. Here's an introduction to the maths of rocks.

From communication technology to LCD displays: crystals are a hugely important part of modern life. Find out more about them with this article.

Why your muesli shakes down in unexpected ways.

Is the proposed ABBA rule for penalty shootouts really fairer than the existing rule? Maths shows that it is, and also suggests another, more subtle rule.

Compound interest is the curse of debt and the blessing of saving. Find out how it works and what it has to do with one of the most important numbers in mathematics.