It’s not often that a mathematics textbook is described as “gorgeous” or “a work of practical art.” But An Illustrated Theory of Numbers by Martin Weissman, associate professor of mathematics at UC ...

Dunbar’s number: why my theory that humans can only maintain 150 friendships has withstood 30 years of scrutiny Published: May 12, 2021 12:24pm EDT Robin Dunbar , University of Oxford ...