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David Baddiel tries to get to grips with pi - and infinity.

David is asked by a member of the public to try and understand Pi, and what it means for its digits to continue infinitely. He starts out with a mathematician and the biggest circle he can find, and then tracks down a philosopher. But can he understand it well enough to explain it himself - to one particularly demanding member of the public?

Producer: Giles Edwards.

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15 minutes

Broadcast

Seven ways to explain the Kardashians

Seven ways to explain the Kardashians

It’s hard to imagine life without them but many don’t quite understand why they're around

Podcast