Something strange this way comes What is a strange attractor? Wikipedia says an attractor is a set of numbers towards which a system tends to evolve. It then says that an attractor is called strange if its set is fractal. If you’re like me, that definition went in one ear and out the other. Here’s an infinitely better definition:
Imagine how a planet orbits a star. The planet is attracted to the center of the star by gravity, but its angular momentum flings it into an ellipse, rather than just letting it fall into the star.