But what is light? (Barber pole, part 2)

This demo surprised me (a lot) | Barber pole, part 1

A pretty reason why Gaussian + Gaussian = Gaussian

This pattern breaks, but for a good reason | Moser's circle problem

How They Fool Ya (live) | Math parody of Hallelujah

Convolutions | Why X+Y in probability is a beautiful mess

Why π is in the normal distribution (beyond integral tricks)

But what is the Central Limit Theorem?

But what is a convolution?

Researchers thought this was a bug (Borwein integrals)

We ran a contest for math explainers, here are the results (SoME2)

How to lie using visual proofs

Summer of Math Exposition 2 Invitation

Olympiad level counting

Oh, wait, actually the best Wordle opener is not “crane”…

Solving Wordle using information theory

A tale of two problem solvers

2021 Summer of Math Exposition results

Beyond the Mandelbrot set, an intro to holomorphic dynamics

From Newton’s method to Newton’s fractal (which Newton knew nothing about)

The Summer of Math Exposition

A quick trick for computing eigenvalues | Chapter 15, Essence of linear algebra

How (and why) to raise e to the power of a matrix | DE6

The medical test paradox, and redesigning Bayes' rule

Hamming codes part 2: The one-line implementation

But what are Hamming codes? The origin of error correction

Group theory, abstraction, and the 196,883-dimensional monster

The impossible chessboard puzzle

The DP-3T algorithm for contact tracing (via Nicky Case)

Lockdown math announcement