The late-19th and early-20th centuries saw a revolution in transportation with the invention of the airplane and automobile. The earliest recognized use of wind power is the sailing ship; the earliest document of a ship underneath sail is that of a Nile boat dating to the 8th-millennium BCE. From prehistoric instances, Egyptians in all probability used the power of the annual flooding of the Nile to irrigate their lands, progressively studying to manage much of it via purposely built irrigation channels and “catch” basins. The ancient Sumerians in Mesopotamia used a posh system of canals and levees to divert water from the Tigris and Euphrates rivers for irrigation.
- Operating in the Arctic permits the Army to powerfully project ally forces to enhance their ability to respond in competitors, crisis or conflict.
- Early people evolved from a race of foraging hominids which have been already bipedal, with a brain mass approximately