Happy Pi Day! Also, happy 146th birthday to Albert Einstein. (I love that his birthday is Pi Day. Seems appropriate and makes it so easy to remember.) Over the years, I’ve written quite a bit here about the weirdly omnipresent transcendental number we call pi (p) — 3.14159 (roughly speaking).

As such, I won’t go into it again here today. (Though I do plan something for my Substack blog — where there is a fresh audience for old posts.)

This is actually a Friday Notes post, although — change for the new year— I’m dropping the standardized title format I’d started using for day-based category posts.

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