## 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 some many Fridays falling on a 13th. |
Does reality arise from information? What does this even mean? Anton Zeilinger explains the impact of John Wheeler's radical idea. |

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