The human body is a mysterious thing.

We do things all the time like yawning, sneezing, and stretching, without even thinking about them. Even if we don’t take the time to wonder why, scientists do. They spend their time studying the body and its many behaviors, and they have answers to some of the most common questions. Here’s what happening when your body starts doing its own thing.

1. Yawning

When your brain gets too hot or overwhelmed, yawning helps keep it calm, cool, and collected.

Read More: If The Sun Were To Ever Disappear, Here Are 12 Ways We’d All Basically Be Screwed

2. Sneezing

Sneezing lets your body eject dust, irritants, and other microbes that it doesn’t want hanging around.

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