Hello and welcome to Mysteries of Science. My name's Stevie and I'm the deputy editor of Science and Nature, the monthly magazine from the team behind the week junior.

And I'm Michael the Features Editor. On this podcast, we investigate weird events, strange creatures and mysterious places.

Today we're going our journey under the sea to find out how deep the ocean goes and what it's really like at the bottom.

Yes, the Mariana Trench is the deepest point on Earth.

It is one of the least explored places on the planet and only a handful of people have ever been there.

So what mysteries does it hold?

Join us and some expert guests as we hop in a submarine and journey down into the deep.

This is Mysteries of Science.

Before we get started with today's mystery, we have a little fact for you and we want you to figure out whether it's science fact or science fiction.

Okay, are we ready? In 2014, research has recorded

strange spaceship-like sounds coming from the Mariana Trench, which they called a bio-twang.

A bio-twang, okay, we'll reveal the answer at the end of the show, or you can find out for yourself

in the pages of this month's issue of the Week Junior Science and Nature magazine out now.

Right, now back to the mystery.

Okay, Michael, so we want to find out more about the deepest point on Earth. Who should we talk to

first? Well, how about we bring in the expert who

wrote about this topic for us in the latest issue of the Week Junior Science and Nature magazine?

Hi, I'm Melissa Hobson. I'm a writer and I specialize in writing about the ocean and the animals that live

there. Aha, welcome to the show, Melissa. Tell us, what is the Mariana Trench?

Where is it?

And why is it so important?

The Mariana Trench is the deepest point that we know of in the planet.

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