Emily, do you remember when One Direction called it a day?

I think you'll find there are still many people who can't talk about it.

Well luckily, we can.

A lot, because our new season of terribly famous is all about the first One Directioner

to go it alone.

Zayn Malik.

We'll take you on Zayn's journey from Shilad from Bradford to being in the world's biggest

boy band and explore why, when he reached the top, he decided to walk away.

Follow terribly famous wherever you get your podcasts.

This is CBS Eye on the World.

Here's John Bachelorette.

I'm John Bachelorette.

Where does lithium come from?

Comes from the heavens.

That's right.

Comes from stars.

Special kinds of stars.

And to help me understand this, I welcome Ken Croswell, Dr. Ken Croswell, author of

The Lives of Stars and other distinguished publications.

He's an astronomer, writing a sky and telescope, which is a wonderful magazine for obsessive

people watching the sky.

In an article of the little stars that Ken, we need to do some history, some discovery

...