Four hundred years ago Belgian physician Johann Baptist Van Helmont was persecuted by the Roman Catholic Church for promoting the use of the “Powder of Sympathy” that was supposed to treat wounds...
Snow-making machines actually make tiny beads of ice, each one about one ten-thousandth of an inch in diameter. Water is sprayed from a hose together with compressed air. The air is needed because...
Four hundred years ago Belgian physician Johann Baptist Van Helmont was persecuted by the Roman Catholic Church for promoting the use of the "Powder of Sympathy", a concoction that was supposed to...
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