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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 tracks the formation of snowflakes from their origins in bits of dust in clouds that become droplets of water falling to Earth. As each snowflake rises and falls through warmer and cooler air, it develops its own distinctive shape.…

This video takes science to the skies and checks out the chemistry behind chemtrails, or—more accurately—contrails. It’s easy to look at the white trail behind a jet aircraft and imagine all manner of chemicals raining down from above.…

This animation explains continental drift and shows how continents on moving tectonic plates drift slowly across the Earth's surface.

On December 16, 1773, American colonists, frustrated and angry at Britain for imposing "taxation without representation," dumped more than 340 chests of British tea into Boston Harbor in Massachusettes. Dubbed "the Boston Tea Party," this…