Welcome to the 200th Carnival of Mathematics! Since it’s a special occasion, we’re hosting it right here at the Aperiodical, and presenting a round-up of some of our favourite blog posts, videos and content from the internet in the month of November 2021.

The Carnival is hosted by a different blog each month, and brings together submissions from readers and the hosts’ own favourites. To find out more about the Carnival, or offer to host a future edition, visit our Carnival of Maths page.