Exercise for the reader: train your AI to identify this cat
More from Chalkdust
Dog leads, mirrors and Hermann Minkowski
Donovan Young looks at the shapes made when two cones collide
Well, well, well…
A fiendish puzzle for you to 'pour' over...
Advent facts III
Behind today's door... More fascinating facts!
Christmaths carols II
Behind today's door... Another carol!
Find your perfect partner
Find your perfect partner with this wonderful tree diagram!
Fractograms
Hugh Duncan explores the hidden patterns of fractions