Back in the Stone Age, people learned to process volcanic glass - obsidian. It was used to make arrowheads, axes and other cutting tools! Since that distant time, this unique material has evolved alongside humans. Today glass is an integral part of every room and is used in exterior and interior decoration. It maximizes light fluxes and expands space. The possibilities of this material are endless. It is strong, environmentally friendly, durable, non-flammable, and relatively easy to cut and process. This allows us to make stained glass windows, door panels, decorations from glass... Optical instruments, lenses, telescopes, glasses would not have appeared in our lives without the discovery of glass. Today, thanks to huge reflecting telescopes, we have the opportunity to look into other galaxies! For modern people, glass has become something commonplace, but we want to tell you as much as possible about this fabulous material that is born in the crucible of fire. Read!