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Science Phosphorus: The 1% element vital for life Mark Frauenfelder

chemistry Silica gel's secret history and path to worldwide ubiquity Allan Rose Hill

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chemistry See what happens when a spoon of liquid nitrogen is dropped into a bowl of gasoline Popkin

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books The wonderful smell of old books Rob Beschizza

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chemistry Trying to recreate a stink so foul it was considered dangerous to smell Gareth Branwyn