It's not very intuitive how large the cumulative probability of an event is for which the annual probability is low. So I made this chart.

If the annual probability for some event is 1%, then the cumulative probability that this event happens within 100 years is 63%. pic.twitter.com/DIxyurBzpo

— Max Roser (@MaxCRoser) March 4, 2022

Primitive Pythagorean triple have the form (m^2 – n^2, 2mn, m^2 + n^2) for positive integers m and n, one odd and one even.

— Algebra Etc. (@AlgebraFact) March 3, 2022