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Thomas Sperling discusses some furry Fermi problems

We review the second of this year's nominees for the Book of the Year

Ellen Jolley asks for (independent) Sage advice

Coffee, Brexit and badgers are among the topics of discussion in this issue's Dear Dirichlet advice column

Defining what exactly an integral is leads naturally to an explanation of how to handle approximating them.

What happens if you play the prisoners' dilemma against yourself?