More from Chalkdust
Hiding in plain sight
Axel Kerbec gets locked out while exchanging keys
Counting caterpillars
Peter Rowlett uses combinatorics to generate caterpillars
Thinking outside the box
Negative polygons and other mathematical creations
A brief history of gravitational waves
The discovery of gravitational waves offers a new way of looking at the universe. Who knows what we will discover?
Time turns backwards at the Spark Festival
The extreme weirdness of slow viscous flows, and why borrowers shouldn't use doggy paddle.
Introducing the Cuboku
Can you solve our 3D Sudoku puzzles?