Glass can melted in a furnace, blown & shaped, often by a team of artisans, in a process called The Dance.
It can also be worked over a torch by a single artisan, creating works of singular beauty and function.
Some artisans use The Warm method, fusing glass in a kiln or slumping to create new forms.
Others choose to work cold, using cutting tools & lead cane to make windows and suncatchers.
All are making use of this ancient (& not completely understood) media in their own unique ways.
It is a close to magic as we get in the everyday world.