Looking for a challenge? Try the Curios.
A collection of cover images I've created for Teaching Mathematics.
Take a moment to visit the Shrine to My Favourite Scratch-It.
See some of my other favourite things.
See some of the waterfalls I've visited in Tasmania.
A definition of Borges' number and its first few digits, plus some pages from the Library of Babel.
What is a Cypher prime?