The earliest known man made glass dates back to circa 3500 BCE and to Egypt and Eastern Mesopotamia. Discovery of glassblowing around 1st century BC was a major breakthrough in glass making.
Man Made Glass
3500 BCE
That History Story,
was first published on TST 5 years ago.
All story is part of the broader TST project.
These short entries help separate what is known, what is inferred, and what remains open. That distinction is where careful thinking begins.
The end!