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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 comet is and shows the different graphical distinctions of a comet with respect to its distance from the Sun

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.

Yes, you read that correctly. Comets may have helped seed life on Earth. Far out, right? Sarah Everts of C&EN has the chemical clues that back up this out-of-this-world hypothesis. Credit: Reactions/American Chemical Society

How do astronauts survive the deadly radiation of deep space? NASA is still figuring out how to protect astronauts from cosmic radiation using plastic shielding and magnetic deflectors. Credit: Reactions/American Chemical Society

This animation explains how seasons depend on the Earth's orbit and explains how the earth's orbital distance and axial tilt give rise to seasons.

This animation shows how eclipses occur when the Sun's rays are blocked.

This animation depicts how the solar system formed from a spinning disk of interstellar gas.

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.

This animation explains Kepler's first law of planetary motion and demonstrates a planet's elliptical orbit around the Sun.

This animation demonstrates Kepler's second law of planetary motion using 12 triangles of equal area.

This animation shows Kepler's third law of planetary motion by comparing the revolutions of two planets around the Sun.

This animation shows how the phases of the Moon depend on the relative positions of the Earth, Moon, and Sun.

This animation explains what telescope aberration is and shows how Earth's rotation affects the shape of viewed objects

Andy Klesh of NASA's Jet Propulsion Lab welcomes you to the cleanroom to talk about how satellites smaller than a briefcase could one day explore the chemistry of alien moons and planets. But first, Andy and his team have to show that…

There are many misconceptions about what causes auroras as well as when, where, and how they occur. Watch this video to learn the true answers. Credit: Reactions/American Chemical Society

Carbon is the backbone of all forms of life on Earth, and perhaps in the surrounding universe. This video explores the chemistry of carbon to explain why. Credit: Reactions/American Chemical Society

This video explores the curious question of why dust from the surface of the Moon smelled like spent gunpowder to Apollo astronauts. Credit: Reactions/American Chemical Society

As the late Carl Sagan famously said, "We are made of star stuff." What exactly did he mean? In this video, best-selling author Sam Kean explains the chemistry behind this iconic quote. [Credit: Reactions/American Chemical Society…