How Do They Do It? S15E5: Leaning Tower of Pisa, Eider Down and Digestive Biscuits
- Aired: 2019-10-11
- Time: 22:00:00
- Runtime: 30 minutes
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Overview
It's been tipping over for 800 years - what's the gravity-defying magic behind Pisa's leaning tower? And, how are chocolate digestive biscuits manufactured?