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Keyword: metal oxides

Shiny pennies

Pennies lose their shine after a while. This experiment explains what causes the dull colour on coins and how to make your pennies bright again.

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STEAM Transcultural Science Communication Summer School is organised by the University of Malta, European Union of Science Journalists’ Associations, Haaga-Helia University, Rhine-Waal University, Science View, and University of Edinburgh. Funded by the Erasmus+ programme of the European Union. This project has been funded with support from the European Commission. This publication reflects the views only of the author, and the Commission cannot be held responsible for any use which may be made of the information contained therein.