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Is gluten good for you, or is gluten bad for you? This video breaks down the chemistry and science behind this controversial food ingredient. Credit: Reactions/American Chemical Society

Are you breathing air molecules that were once exhaled by Caesar, Joan of Arc, or Madame Curie? Why did Albert Einstein try to break into the refrigerator business? In this video, writer Sam Kean, author of science books "Caesar’s Last…

This animation shows how a barometer measures atmospheric pressure.

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

Some ice burns because it’s actually methane trapped in water. This video discusses the chemistry of methane hydrates as a source of energy and a climate change threat. Credit: Reactions/American Chemical Society

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

When temperatures fall along with snow, you know you're in the middle of winter. This video has seasonal advice on keeping your windshield fog-free, getting unstuck from the snow, and even how to make your own hand warmer. [Credit:…

This video examines the science behind the most misunderstood spice in the world: allspice. [Credit: Reactions/American Chemical Society (www.youtube.com/acsreactions)]

Pepper is one of the most common condiments in the world today, but it used to be more valuable than gold. This video examines how pepper's delectable chemistry made it a key player in the global spice trade. [Credit: Reactions/American…

This video explores the chemistry of, and pain response to, pepper spray. Watch for some important tips on what to do if you accidentally spray yourself with this debilitating substance. Credit: Reactions/American Chemical Society