Horizon - Season 47 Episode 6 How Long is a Piece of String?
Overview: 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.
Comment
Excellent BBC science show delivered by top industry recognised professors. Loved by millions of fans and academic institutions worldwide. It really is the model for science communication.