Welcome. Topics you might be interested in:
See a graphic view of the historical temperaments. With the advent of electronic tuning aids, these are now viable alternatives to the "equal temperament" that has been the theoretical norm for most of the past century. Includes timeline of historic temperaments with composers. Judge for yourself which temperament to use for a specific composer.
The Circle of Fifths and the Octave. Twelve moons don't make a year, and twelve perfect fifths don't make an octave.
For Tuners: Listening to Beat Rates. Illustrating the beats of major thirds from A2 to F4.
Links of interest to piano technicians. Many of these are old and broken.
"Becoming Jason" -- nine passport photos. I started travelling pretty early.
A Visual Proof of Pythagoras' Theorem. Right triangles obey cosmic laws.