An environmentally friendly, biodegradable and vegan-friendly glitter has been made by scientists at the University of Cambridge and is inspired by butterfly wings and peacock feathers. The non-toxic sparkly material is made of cellulose nanocrystals, tiny bundles of the same hardy natural fibre which forms the foundation of plants.... The crystals appear to glisten and twinkle like glitter because they distort light via a process called “ structural colour ”, according to the academics. The or