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smallest Christmas card

Scientists create world’s smallest Christmas card

NEW YORK: British scientists have created what they believe is the world’s smallest Christmas card, a seasonal greeting so tiny that over 200 million of them could fit into a standard postage stamp. The card, created by the National Physical Laboratory (NPL), the U.K.’s national measurement standards laboratory, measures 15 x 20 micrometers. A micrometer is one millionth of a metre. It is made from platinum-coated silicon nitride, and was illustrated using a focussed ion beam. The card’s cover features an etching of a…