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Hello and welcome to the intelligence from The Economist. Today, from London, I'm your host,

Jason Palmer. Every weekday, we provide a fresh perspective

on the events shaping your world. In Ethiopia's northern region of Tigray, a vicious, nearly two-year-old

civil war continues to grind on. A thousand kilometers away, Addis Ababa is undergoing a radical makeover.

We ask why the Prime Minister is spending so much capital on the capital. And it's never

seemed quite right that a mentally challenging day can make you feel just as tired as a day of

manual labor can. But the pencil pusher's struggle is real.

Thinking hard really does take it out of you.

And now, scientists think they know why.

First up, though.

Britain's Britain is getting ever closer to having a new prime minister.

...