## Articles

China has recently revoked its one-child policy. What better occasion to explore the mathematics of population growth with a surprising example.

It would be foolish to ignore evidence. Luckily Bayes' theorem shows us how to take it in into account.

Find out why leap years exist, why you have to wait 400 years for your birthday pattern to repeat, and why there are so many Fridays falling on a 13th.

The fuzziness of the quantum realm could arise from mathematical restrictions on what can ever be known.

Does reality arise from information? What does this even mean? Anton Zeilinger explains the impact of John Wheeler's radical idea.

Celebrating the 150th anniversary of Maxwell's equations we talk to physicist John Ellis about what they mean for modern technology and our understanding of the Universe.

In *The Neverending Story* a little boy named Bastian discovers that there's something extraordinary about the book he's smuggled into his backpack: it changes as he reads it. The act of reading "The Neverending Story" Bastian finds, is simultaneously the act of writing it. Could our universe be in a similar loop?

A new framework for the laws underlying reality could explain why nature obeys quantum rules, the origin of time’s arrow, and the power of quantum computing.