How do you want to spend your coffee break?

A small, thoughtfully curated companion for your coffee break.

Choose something from maths, physics, philosophy or history. Each piece takes about 15 minutes.

A latte on a sunlit wooden table overlooking trees, water and distant mountains

Edition One

In the works

Maths · The Collatz conjecture

Does every number lead to one?

Halve even numbers. Triple odd numbers and add one. Repeat. I tried this rule on a million starting numbers. They all reached 1. Will every positive whole number do the same?

Philosophy · Epictetus

What’s actually up to you?

You can spend a whole morning replaying a conversation you’ve already had. Epictetus gives you a way to decide what’s still worth your attention.