Hello and welcome to this very special episode of Mysteries of Science in association with Bandai.

I'm Dan, the editor of Science and Nature, the Monthly magazine from the Team Behind the Week Junior.

And I'm Kieran, the features editor. We've got such a good mystery to investigate today, and it is going to take us all the way back in time

and right to the depths of the deep blue sea.

Oh yes, it's the mystery of the Meg.

We'll be looking at the largest fish ever to live, the mighty shark megaladon, and asking one huge

jawsome question.

Could it still be alive today?

Jawsome. So good.

This is an idea that sounds like something from a very popular dinosaur theme park film series,

but the idea of prehistoric sharks still swimming around today is one that keeps coming back.

As recently as 2013, in fact, a film which was

promoted as being a documentary, suggested that the Megalodon could still be alive. I think there's

something fishy going on here and we're going to have to get to the bottom of it. This is

Mysteries of Science.

Right, Dan, before we get to the question of whether the Meg is still alive today, why don't we take a little bit of time to find out more about the shark itself?

And for that, I think we need an expert in all things prehistoric fish, particularly sharks.

Have we got anyone that's willing to help us?

Hi, my name's Emma Bernard, and I'm the creator of fossil fish at the Natural History Museum in London.

And I'm specifically responsible for 100,000 specimens of fossil fish, which date back to about 420 million years ago right up to present day.

And I'm particularly interested in fossil sharks, how they evolved, how they adapted,

and how they became extinct. And one of my favourite sharks is the Megalodon.

...