Pilot wave theory is an extension of quantum mechanics that doesn't exhibit any of that weird randomness or fuzziness. But that doesn't mean it's totally sane. Here is a quick introduction.

How to squeeze infinitely many new guests into a full hotel.

When it comes to the entire cosmos, we humans are incredibly small and insignificant. But that's precisely why we need to take ourselves into account when thinking about the Universe. Find out why.

A brief introduction to the strange theory of quantum mechanics and how it appears to afford a special role to observers.

So easy to describe, yet so hard to prove.

Mathematicians are working hard to understand an impenetrable proof of the famous ABC conjecture.

The possibility that there might be many parallel worlds has just become a little more likely.

This problem about an infinite sum has a surprising answer.

This surprising result about 3D shapes tells us something deep about the nature of space.

Euler may not have cracked this problem completely, but it led to a lot of important work, including on what we today know as sudoku.

Can you move a knight on a chessboard so that it visits every square exactly once? Euler was one of the first to analyse this problem systematically, but some questions about it are still open today.