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Greeks, Ottomans, And An English Noblewoman Were Vaccine Pioneers
Learn about the lost pioneers, professional duels and ‘aha’ moments that preceded the most exceptional inventions and scientific breakthroughs. “My face will never become ugly and full of pockmarks,” said an English milkmaid in the 1760s, while a you
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Water Seeps Through Perforated Layers
1 The top layer consists of slabs separated by permeable joints or drainage asphalt, which is deliberately designed with cracks so the rainwater seeps through, instead of collecting in gutters. 2 Beneath the top layer is a combination of gravel and s
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5 Things You May Not Know About The Smallpox Vaccine
1 By medieval times, Chinese doctors already knew that smallpox pus could cause immunity. But unlike their later European colleagues, they did not place the pus under the skin. Instead, they made powder from pustule crust, which they subsequently inh

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