Who are interested in finance should read misbehavior of markets and Fractals and scaling in Finance and then SCoFT.
For other areas, there is a documentary on YouTube by Arthur c Clarke "Fractals, the colors of infinity". Mind blowing stuff. Bonus, David Gilmour' guitar.
Nassim Taleb's mentor proved Wall Street's math is a lie. Before black swans, Nassim Taleb had a teacher: Benoit Mandelbrot, the father of fractals.
His finding was brutal - in the textbook model, a "10-sigma" crash should happen once in millions of millions of years. In real markets, those days keep showing up.
Over the last 100 years, almost all the money was made and lost in about 10 days. The rest barely mattered.
"Only the very few rare events count. The rest hardly counts at all."
"The bell curve doesn't just understate market risk - its assumptions are absurd."
"Great fortunes were made in very few days. Great ruins happened in very few days."
~80 min, free. the mathematician who proved markets are rougher than anyone admits ↓