More from Chalkdust
How to cheat at cards
Kevin Houston teaches us how to deal ourselves the best hand
Top ten vote issue 11
Vote for your favourite maths-themed day out
The evolutionary arms race
Applying game theory to evolution
Constructing a sphere with 455 cups
Paper cups do not follow a hexagonal pattern and the cones do not meet at a single point, but they do make a gigantic sphere
Chalkdust Issue 3 coming soon! 14/03/16
Your first peek at our Spring issue
Finding the edge of your images
How can we identify objects in photos, to diagnose cancer or predict the weather? Using gradients!