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Horizon
BBC Two

S47E06: How Long is a Piece of String?

Horizon · 2009-2010
Aired 17 Nov 2009 at 8:00pm (UTC)

Synopsis

Alan Davies attempts to answer the proverbial question: how long is a piece of string? But what appears to be a simple task soon turns into a mind-bending voyage of discovery where nothing is as it seems.

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