Hello, welcome along. It's time for a brand new episode of the Fun Kids Science Weekly. My name's Dan.

Thank you so much for listening. I am your guide as we tour around to search for all the truly

remarkable secrets lurking in the universe. This week, we're looking at one of the best hunters

out in the wild. You can also hear about a star that's been sent hurtling across the universe,

and I've got some of your questions to answer.

Today, they're on lava lamps, on waking up, and about water as well.

We'll cover those in just a sec.

First, let's get into it with one of our favorite geniuses on the show.

This is Professor Halleck.

Professor Hallex's digital dental depository with support from Philip Sonicare.

To honour great uncle halitosis, dentists extraordinaire, on the occasion of his 100th birthday,

Professor Hallex is creating a pop-up digital dental depository, an oral health desk.

He's going to see how many questions all about teeth he can answer against the clock.

I think the turbine's nearly up to speed.

Fun facts about fluoride today, Nurse Nanobot.

Are you ready?

I'm ready.

Let's crack on with the first question. What is

fluoride? Fluoride is a chemical compound, an inorganic, monotomic, anion of the element fluorine.

Sorry, prof. You'll have to make it a bit simpler than that. Okay, fluoride is a natural mineral, which is really good for your teeth. It's naturally found in many foods and in the water we get from our taps. Hmm. Is fluoride added to our tap water? Well, fluoride has been proven to have massive benefits to dental health and to

significantly reduce tooth decay. But as the natural level of fluoride in our water varies

across the country, it's added in some areas. Impressive. So how does fluoride help to keep the teeth

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