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Their company's success helped build a nation.

The company is such a big part of Korea's economy.

But who are the family behind one of the world's tech giants?

They often say, look, we built the nation.

And without us, South Korea as it exists today,

would simply not be here. Inheritance, Samsung explores the real-life dramas of the Lee family

and their company. They are the equivalent of royalty. Listen first on BBC Sounds.

Hello, welcome to Doctor's Notes.

I'm Dr. Chris Van Tiliken.

I'm Dr. Zand.

He's my identical twin brother.

We've just finished recording an interview, haven't we, Zandi, with Professor Hester Parr.

She is a professor of human geography, and her interest is sunlight and mental health. She runs a research group

about living with seasonal affective disorder at the University of Glasgow.

Now this is a great topic for this time of year, isn't it, Chris? Because people have endured

a long, grim winter. And I think there will be people who are already dreading the next one.

In the main episode, I really liked her phrase, your attitude to your latitude.

That's the, I mean, that is that, it was so good.

Your latitude is how far you are away from the equator toward the North Pole or the South Pole.

And you could live at the same latitude, and yet you could have very, very different experiences of light, of weather, of mood.

In Doctor's notes, we're taking a deeper dive into seasonal, effective disorder, and I think

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