More from Chalkdust
Chalkdust issue 19 – Coming 20 May
Pre-order your copy now!
How much hair?
Thomas Sperling discusses some furry Fermi problems
The Newton–Raphson fractal
James Christian and George Jensen zoom in, out, in, out, and tell us what it's really all about
On the cover: Apollonian packing
David Sheard explores the rich mathematics and history behind the Apollonian packing, and the cover of issue 11
Christmaths carols II
Behind today's door... Another carol!
Finding the edge of your images
How can we identify objects in photos, to diagnose cancer or predict the weather? Using gradients!