Hi, you're about to get smarter in just a few minutes with Curiosity Daily from

Curiosity.com. I'm Cody goth. And I'm Ashley Hamer. Today you learn about how

disgusting sights literally turn your stomach and why tattoos are permanent.

Then play along at home as we test your podcast knowledge in this month's edition of Curiosity Challenge trivia.

Let's literally satisfy some curiosity.

All right, this is going to be gross, but you know that queasy feeling you get when you

pour chunks from a carton of expired milk you just found in the back of the fridge.

Yeah, you might say the experience turned your stomach.

Well, recently, scientists explored what's going on there and they discovered that the description is more accurate than you'd think.

Disgusting sights literally turn your stomach.

That familiar queasy feeling is caused by an interruption in the nerve impulses in your stomach.

Normally your brain sends rhythmic impulses to your stomach and intestines that make the muscles in your stomach lining contract and relax.

This rhythmic pulsing keeps food moving through your digestive system.

If those signals are interrupted, you start to feel nauseous.

Scientists have known that disgusting smells can interrupt these impulses and make us queasy.

But a recently published study suggests that merely seeing something disgusting is enough to affect our stomach's behavior.

That study came from a team of researchers at the University of Cambridge who performed an experiment

with a group of 25 terribly unlucky volunteers.

The volunteers were divided into two groups, and the experiment had three rounds.

The first round involved showing both groups a series of images.

Many of the images were neutral, like a picture of a scarf or buttons.

But they were mixed in with pictures of things that were downright disgusting,

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