How Do They Do It?
Season 15 Episode 5 of 20
A look at the gravity-defying 'magic' behind Pisa's leaning tower. Plus, the making of chocolate digestive biscuits
How Do They Do It? airs on Discovery Channel HD at 3:00 PM, Monday 19 January. (Subtitles.)
Learn more about How Do They Do It? and other education/science/factual topics on our factual page
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