# Collections

In this year's advent calendar we celebrate our collaboration with the Isaac Newton Institute for Mathematical Sciences.

We love talking to young researchers and laureates at the Heidelberg Laureate Forum, and this year we produced a daily video diary to take everyone behind the scenes of this special digital HLF.

As the world prepares for COP26, the 2021 United Nations Climate Change Conference, we look at how maths can help understand the climate crisis.

Explore the maths behind machine learning and deep neural networks with this collection of short introductions and in-depth articles.

Next month sees the 60th birthday of a famous algorithm called Quicksort. We explore its origin, its workings, and some other work of its inventor Tony Hoare.

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