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How did the ancient Greeks invent parchment with techniques still used today? And how do they make shuttlecocks, the fasting moving object in sport?
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?
How do they make some world's smoothest writing ballpoint pens that don't leak or fade? And, how do they make pizza for soldiers on the frontline?