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Pisa's Leaning Tower, Eider Down, Chocolate Digestive

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?
Aired: Oct 23, 2017 Genre: DocumentaryDuration: 22m Rating: 0 Country: Canada, Singapore, United Kingdom, United States of America Production: WAGtv