A plot of the Lorenz attractor for values r = 28, σ = 10, b = 8/3 An animation of a double-rod pendulum at an intermediate energy showing chaotic behavior. Starting the pendulum from a slightly different initial condition would result in a vastly different trajectory. The double-rod pendulum is one of the simplest dynamical systems with chaotic solutions. Chaos theory is an interdisciplinary area
![Chaos theory - Wikipedia](https://cdn-ak-scissors.b.st-hatena.com/image/square/486c6fc7c7799f17df87bd48d63c7b023790d1f5/height=288;version=1;width=512/https%3A%2F%2Fupload.wikimedia.org%2Fwikipedia%2Fcommons%2Fthumb%2F5%2F5b%2FLorenz_attractor_yb.svg%2F1200px-Lorenz_attractor_yb.svg.png)