Technological Breakthroughs
3.3 million years ago : The first tools, sharp flakes of stone used as knives and larger unshaped stones used as hammers and anvils, were likely used by an ancestor such as Australopithecus 1 . 1 million years ago : The control of fire by early humans, like Homo erectus, evidenced by burnt material in caves 1 . 20,000 to 15,000 years ago : The Neolithic Revolution, which included the transition from foraging to agriculture, the invention of pottery, bricks, woven fabrics, and the wheel 1 . 6000 BCE : The development of irrigation systems in Mesopotamia and Egypt 1 . 4000 BCE : The use of sailing ships on the Nile River 1 . 1200 BCE : The widespread production of iron, which supplanted bronze 1 . 850 CE : The invention of gunpowder by Chinese alchemists 1 . 950 : The first windmills in Persia, which used the wind to operate mills 1 . 1440 : Johannes Gutenberg’s printing press, which revolutionized the spread of knowledge 2 . 14th century : The compass, which greatly improved navigation ...