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It's Okay to Be Smart
Why Do We Cry?
Season 6
Episode 20
Why do we cry? It’s weird. Humans leak water out of their faces when they get sad. Are we the only animals that do this? What does it mean? What is it for? Here’s the science of human tears!
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13:58
The secret physics at the core of every syllable, starting with the first words we speak.
9:56
The glow from faster-than-light particles gives us a unique way to explore the universe.
10:40
A mysterious and highly impactful phenomenon that scientists are still learning about.
9:10
Countershading is everywhere, and it may be nature’s most successful form of camouflage.
12:59
Global warming means more air conditioning…causing more warming 🤦. Could new chemistry he
14:49
How does iridescence work? From rainbow bubbles to beautiful birds, bugs, and gemstones.
11:53
Under house arrest in Egypt, one mathematician transformed how we examine the world.
13:10
We explore why embarrassment has lasted through evolution and its function.
13:49
We are in search of the blackest black things on Earth and why.
14:24
Knowing exactly what a “second” is is more complicated than you might think!
13:41
The secret is In order to know WHERE you are, you need to first know WHEN you are.