Glass is probably as old as the earth. It is found in nature, where it is created by volcanoes and lightning strikes. Today, glass is an extremely versatile high-tech material. Gorilla Glass is unbreakable, fibre-optic cables are flexible, solar cells are becoming transparent, and glass can now be used to store energy. And glass is becoming smart. Great Inventions asks whether the first plaster made of glass, with built-in personal bio-information for faster healing, will be produced soon.