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When it’s time to vote on Election Day, how do you decide on a candidate? In this video, neuroscientist Michael Shadlen explains how our brains secretly do math in order to make decisions. Credit: Columbia University’s Zuckerman Institute

This animation shows how chaotic systems are unpredictable because of their extreme sensitivity to their initial conditions.

This animation explains what a cylcoid is and shows how the size of a cycloid relates to the size of the rolling circle that generates it.

This animation explains that fractals are self-similar geometrical objects at different scales and magnifications and shows how fractals can be generated by applying simple mathematical rules repetitively.