How Do They Do It?
Pisa's Leaning Tower, Eider Down, Chocolate Digestive still
S15E0522 min· aired 10/23/2017

Pisa's Leaning Tower, Eider Down, Chocolate Digestive

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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?