You’ll learn
- The secret of the unbreakable samurai sword
- About paper’s fate in a digitalized world
- How plastic promoted social equality
- What chocolate makers don’t tell us
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first KEY POINT
Have you ever wondered what your phone and house are made of? Looking around, you’ll notice dozens of materials that constitute your reality. What would your life look like if one day they disappeared?Modern society is so focused on financial freedom and spiritual progress that we forget that, ultimately, this world is material. It's made of stuff without which we would have nothing to live in, create with, or eat from. Without metal, paper, and glass, we would have no entertainment, education, or work. Without textiles, we would still wear fur or freeze because a leaf is not a winter coat.For centuries, such materials prolonged our survival and improved our lives. Eras of human progress took the name of discovered materials like the Bronze or Iron Age. Our ancestors treated them like gods with awe and gratitude. Now, instead of clay huts, we have skyscrapers; instead of blank spaces, we have ceramic teeth; instead of playing with sticks, we can scroll a phone screen.
Follow through to discover the power and fascinating world of the materials surrounding us and how much our lives depend on it.
second KEY POINT
People have used metal for years but only understood its nature in the 20th century. Metals are made of obscure crystals, which makes them non-transparent. Their natural defects or atomic disruptions allow the metal to change shape. For example, billions of such dislocations within a paper clip enable it to bend. Without such imperfections, the metal would snap. A razor contains billions of crystals arranged in a particular order, and when used, it becomes blunt because hairs destroy these crystals.There’s more. Metalwork started when our ancestors discovered a greenish rock called malachite that turns into copper if heated. This discovery gave birth to the development and growth of civilizations, like the Ancient Egyptians, who used copper chisels to hand-carve stone blocks for the pyramids.At the same time, they discovered gold. Since it is soft and easily scratched, most accessories are an alloy or a combination of gold, silver, or copper — yep, the gold in your ring is never pure. Due to its scarcity, gold remains one of the most expensive metals on earth.Eventually, steel, an alloy of iron and carbon, revolutionized the production of tools because it was cheap and robust. However, the proper proportions of elements puzzled most steel makers, so they had to learn and work through trial and error.Civilizations that made high-quality steel thrived. Japan, where making a samurai's sword became a spiritual ritual, was the most potent steel-making country. Their sword had two parts:• The central part was made of low-carbon steel — tough and unlikely to break.
• The edge was covered with high-carbon steel — brittle but very sharp.The Japanese remained the best steel-makers until the Industrial Revolution and the production of ships, bridges, and railways. Then, Henry Bessemer introduced his method, which led to the mass production of steel. Now, it penetrates all spheres of life, from machine building to household necessities. In 1903, King Camp Gillette used the material to sell disposable razors, transforming shaving and creating his business empire.
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