Hello, Explorer. Welcome to the smartest show in the solar system where we uncover all the

answers to your brilliant questions. My name is Dan. Every week, we dedicate so much brain power

and time to sorting out your questions. If you ever have anything sciencey that you want answered, make sure you leave it as a voice note for me on the free Fun Kids app. You can do it at FunKidslive.com too. Really easy. There's a big record, but let me know who you are, what you're doing, what's your question, then you can start in the show, and I can do all the digging for you.

Let's get our first one this week. William, what do you have?

Hello, I'm William Dunn and I'm 8. My question is, how and why do we burp?

Burping is your body doing pressure control for your stomach really. You see when

you eat as well as chomping away, you swallow loads of air when you eat food because it's in your

mouth so you kind of swallow it down. Also you get gas in your stomach from fizzy drinks, all those bubbles that you wolf down,

they're bubbling in away, loads of carbon dioxide, stuff like that. You get air in your stomach from

eating fast, chewing gum, talking while you're eating, and all of that gas, it builds at the top of your stomach and your body

doesn't really like the pressure there so it opens a little valve at the top of your belly it's like

the muscle between your stomach and your throat and it just let some out almost like you were letting

out a bit of air from an overinflated tire on your bike or a car, something like that.

Well, the gas from there rises out of your mouth and that's a burp.

And as it rushes through your throat, it vibrates the tissues there, like air swishing through a trumpet.

It rattles around and it makes a sound.

That's why you burp.

That's why it's noisy, William.

Thank you for the question.

Here's one from Sam who wants to know why do cats land on their feet.

Well, they don't always land on their feet.

But they do a lot of the time because of something called the writing reflex inside their ear. In fact, inside our ear too, they've got a little sensor which helps keep them balanced. And for a cat, they're really good at reacting to it because they're quite light, because they're supple.

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