<p>Humans seem to be the only animals who produce one of three different types of tears. Can you guess what it is? Let's look at the science behind crying.</p>

Humans seem to be the only animals who produce one of three different types of tears. Can you guess what it is? Let's look at the science behind crying.

382 - Emotional, Irritated, Faking It—Why Do Humans Cry?

How do astronomers photograph a black hole? How often do planes get hit by lightning? What does the EPA actually do? Science is all around us and transforming our world at a rapid pace. Extragalactic astrophysicist Sabrina Stierwalt is here to guide you through it. She'll help you make sense of the everyday and the once-in-a-lifetime. Rights of Albert Einstein are used with permission of The Hebrew University of Jerusalem. Represented exclusively by Greenlight.

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382 - Emotional, Irritated, Faking It—Why Do Humans Cry?

382 - Emotional, Irritated, Faking It—Why Do Humans Cry?

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