Media type: E-Article Title: The rule of three Contributor: Crease, Robert P imprint: IOP Publishing, 2023 Published in: Physics World Language: Not determined DOI: 10.1088/2058-7058/36/11/21 ISSN: 0953-8585; 2058-7058 Keywords: General Physics and Astronomy Origination: Footnote: Description: <jats:p>From cement and glass to plastics and rare earths, materials come in all shapes and sizes. Hardly surprising, then, that materials-science institutions aren’t easy to pin down, explains Robert P Crease.</jats:p>