In this year's advent calendar we celebrate our collaboration with the Isaac Newton Institute for Mathematical Sciences. From Euler's formula to group theory, there's a lot to choose from, all linked to current research.

Explore the mathematical study of symmetry with this collection of content, which includes short introductions, in-depth articles, a podcast, and some magic!

Should we again reduce our social contacts? Is vaccinating 12-to-15-year-olds effective? What about boosters? The ready reckoner helps provide some answers.

Nearly 200 years ago the astronomer George Biddell Airy had a question about rainbows. Today mathematicians are still working on the area of maths it spawned.