Together, nitrogen, oxygen and argon make up 99.93% of our air. So what’s the other .07%? Find out what makes up the air you breathe.

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Take a deep breath. In a single intake of air, your lungs swell with roughly 25 sextillion molecules, ranging from days-old compounds, to those formed billions of years in the past. In fact, many of the molecules you’re breathing were likely exhaled by members of ancient civilizations and innumerable humans since. But what exactly are we all breathing? Amy Hrdina and Jesse Kroll investigate.

Lesson by Amy Hrdina and Jesse Kroll, directed by Sharon Colman.

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View full lesson: https://ed.ted.com/lessons/what-s-in-...
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Animator's website: http://www.sharoncolman.com
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