WORLD CIVILIZATION

Detailed explanation-1: -He recounted how they landed on a beach, propped a cooking pot on some blocks of natron they were carrying as cargo, and made a fire over which to cook a meal. To their surprise, the sand beneath the fire melted and ran in a liquid stream that later cooled and hardened into glass.

Detailed explanation-2: -Glass has always been found in nature, but the first glass created by humans can be dated to about 4, 000 years ago, when craftsmen working in Mesopotamia, the land between the Tigris and Euphrates Rivers, discovered the art of mixing sand, soda, and lime to make glass.

Detailed explanation-3: -The history of glass-making dates back to at least 3, 600 years ago in Mesopotamia. However, some writers claim that they may have been producing copies of glass objects from Egypt. Other archaeological evidence suggests that the first true glass was made in coastal north Syria, Mesopotamia or Egypt.