Just why the Romans did this, though, remains a mystery. The experts that made the discovery found that the natural ...

Unless you live in an older home with plaster and lath walls, then you’re likely surrounded by panels of compacted gypsum powder that make up the interior walls and ceilings in many homes.

Gypsum, a natural mineral made largely of calcium sulfate dihydrate, has a variety of uses dating back centuries, from lining walls to serve as a fire retardant for Mesopotamians to a plaster ...