I study dynamical systems, topology, the history of mathematics, and recreational mathematics. I am also very interested in writing for general audiences.

For more information, see:

- My publications
- My invited lectures
- More information about my book
*Tales of Impossibility: The 2000-Year Quest to Solve the Mathematical Problems of Antiquity* - More information about my book
*Euler’s Gem: The Polyhedron Formula and the Birth of Topology* - More information about
*Math Horizons*, the undergraduate magazine of the Mathematical Association of America, for which I am currently editor