In his 30s, Alvise “Luigi” Cornaro had become very sick. Suffering pain, fatigue, constant thirst and intestinal distress, his doctors gave him only a few months to live. He radically changed his diet, and within a year was not only still alive, but symptom free and full of energy! He maintained this new diet for decades (except for a short time in his 70s), and in 1558 (at the age of 91 . . . or 94, or 83, or maybe 74 . . . sources disagree on dates) he published a diet and lifestyle book, titled How to Live 100 Years, or Discourses on a Sober and Temperate Life.
The letter S appears nowhere in the word “dollar”, yet an S with a line through it ($) is unmistakably the dollar sign. But why an S? Why isn’t the dollar sign something like a Đ (like the former South Vietnamese đồng, or the totally-not-a-joke-currency Dogecoin)?
There’s a good story behind it, but here’s a big hint: the dollar sign isn’t a dollar sign.
It’s a peso sign.