Glass — Ancient and High-Tech
GLASS is one of humanity's oldest engineered materials — made for over 4,000 years. It is created by HEATING SILICA (sand) until molten, then COOLING it fast enough that it does not crystallize — an "amorphous" solid. Glass is HARD, TRANSPARENT, RESISTANT to chemicals, and easy to mold or blow when molten.
Glass through history. Ancient EGYPT and MESOPOTAMIA made glass beads ~3500 BCE. ROMAN glassblowing (~50 BCE) enabled bottles, vessels, even windows for the wealthy. MEDIEVAL stained glass turned cathedrals into light shows. The 17th-century INVENTION of clear plate glass made windows and mirrors common. 20th century: SAFETY GLASS, BULLETPROOF GLASS, FIBER OPTICS. 21st century: GORILLA GLASS for phones, smart glass that darkens electronically.
Modern FIBER OPTIC CABLES use ultra-pure GLASS for what?
High-tech glass. SMARTPHONE displays use chemically-strengthened Corning Gorilla Glass. SMART WINDOWS can darken with electric current. LASERS use special glass for amplification. SCIENTIFIC INSTRUMENTS use precision glass. Even FUSION reactor windows must withstand extreme conditions.
Glass Inventory
Look around. Count glass: windows, bottles, cups, screens (most modern phones, TVs, laptops have glass screens), eyeglasses. Modern life is full of glass — from low-tech to ultra-tech.
Glass is one of humanity's most beautiful materials. Ancient and futuristic at once.
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