Hello, welcome along to the Fun Kids Science Weekly, the only podcast that promises to uncover all the real secrets lurking out there in the universe.

My name is Dan. Thank you so much for listening. This week, our dangerous, Dan, will actually change everything you ever thought you knew about one sea beast. It's a good and I promise, stick

around for that. Also, we'll hear how a part of Mars is going back home and I've got some of your

questions to answer. Today they're on DNA, taste and warm-blooded creatures. It's all on the way

on the Science Weekly. First, let's catch up with one of our favorite geniuses on the show.

This is Professor Hallux.

Professor Hallex's Digital Dental Depository, with support from Philip Sonic Hair.

To honor great-uncle halitosis, dentist extraordinaire, on the occasion of his 100th birthday,

Professor Hallex is creating a pop-up digital dental depository, an aura of the dentist extraordinaire on the occasion of his 100th birthday.

Professor Hallecks is creating a pop-up digital dental depository, an oral health help 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.

Or our toothbrushes will be.

Are you ready, Nanobot?

I'm ready. Let's go. First question. What different types of toothbrushes are there? Good question.

Well, as we have seen, hundreds of years ago, people used small twigs to clean their teeth.

Although I doubt many people still use a twig today.

Toothbrushes as we know them today started to be used in China over a thousand years ago,

although using hair from animals as bristles.

The first mass-produced toothbrushes were seen in the early 19th century,

with bone handles and using pig bristles in cheaper toothbrushes and badger hair in more expensive ones.

As well as plastic handles, synthetic fibres started to replace animal hair in the 1930s.

A more recent development has been electric toothbrushes.

...