Swiss Cheese, Tanks, British Library

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How Do They Do It?
1st July 2011 22 mins Season 8 Episode 5

How do they put the holes in Swiss cheese? How do they restore and improve a classic battle tank? And how do robotic librarians run one of the world's biggest...

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Pretzels, Gondolas, Pearls still
Season 8 · Episode 6

Pretzels, Gondolas, Pearls

How do they persuade an oyster to grow a perfect pearl? How do they put the twist in classic Pennsylvania pretzels? And how do they build Venice's traditional gondolas?
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