The earliest recognized use of wind power is the sailing ship; the earliest record of a ship underneath sail is that of a Nile boat relationship to the 8th-millennium BCE. From prehistoric times, Egyptians probably used the facility of the annual flooding of the Nile to irrigate their lands, progressively studying to regulate much of it via purposely built irrigation channels and “catch” basins. The ancient Sumerians in Mesopotamia used a complex system of canals and levees to divert water from the Tigris and Euphrates rivers for irrigation. Continuing improvements led to the furnace and bellows and offered, for the first time, the flexibility to smelt and forge gold, copper, silver, and lead – native metals found in relatively pure kind in nature. The advantages of copper tools over stone, bone, and wooden instruments had been quickly obvious to early people, and native copper was most likely used from near the start of Neolithic instances .
Native copper does not naturally occur in large amounts, but copper ores are quite common and some of them produce metal easily when burned in wooden or charcoal fires. Eventually, the working of metals led to the invention of alloys similar to bronze and brass . The first uses of iron alloys similar to steel dates to around 1800 BCE. Other technological advances made through the Paleolithic period had been clothes and shelter; the adoption of both technologies cannot be dated exactly, but they have been a key to humanity’s progress. As the Paleolithic … Read More
