How Do They Do It?
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How Do They Do It?
Sonndeg, 15:02
How did the ancient Greeks invent parchment with techniques still used today? And how do they make shuttlecocks, the fasting moving object in sport?
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Engineers look at Pisa's gravity-defying tower that has been tipping for 800 years; a lucky duck is unharmed while its down is used in the world's most-expensive duvets.
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