This Is Why We Yawn (And Why It’s So Contagious!)

This Is Why We Yawn (And Why It’s So Contagious!)

Yawning might seem like a boring part of being sleepy, but did you know it’s actually a scientific mystery? Even scientists still aren’t 100% sure why we yawn—but they do have some pretty cool theories. In this article, we’ll explore what happens in your body...
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