世界历史大事记（Chronicle of world history）.docVIP

世界历史大事记（Chronicle of world history） 1 million years ago, mankind mastered the use of fire technology. 20 thousand years ago, man invented bows and arrows. 10 thousand years ago, mankind entered the settled farming society. During the first 7000 years, pottery and molded pottery were in the period of Yangshao culture in china. The first solar calendar in the world was invented in ancient Egypt in the first 4241 years. For the first 4000 years, Egyptians had mastered pottery making, metallurgy, wine vinegar manufacture, and pigment dyeing. In the 2500, Egyptians used sand and soda to make glass. Before 2100, the people of Mesopotamia invented the sixty carry system and multiplication table. In the 2000, Egyptians invented decimal, integer and fractional arithmetic, triangular and circle area calculations, square cone and cone volume calculations; invented preservatives to preserve mummies. Before 1950, the Babylonians could solve the first and two equations of two variables. Before 1200, China made silk with silk. Before 1200, Chinese Shang Dynasty bronze (copper and tin alloy) casting technology has reached a mature stage. 1066 - 221 years ago, the Zhou dynasty. Pre 770-, top 476, spring and autumn period. For the first 770 years, China has cast iron. 722 years ago, Chinese began to use the heavenly stems and Earthly Branches in mind. The first 700 years, Guan Zhong (top 725-645) recorded the magnet. Before seventh Century, the Babylonians discovered the cycle of Saras cycle of eclipses. For the first 611 years, China had the earliest record of comets, the later Halleys comet. Before sixth Century, Telles of Greece (Thales, 625-547) discovered that amber rubbed electricity and found that magnet attracts iron. Before sixth Century, the Greek Pythagoras proved the Pythagorean theorem that the irrational number, proposed sphere said of temperament. In sixth Century, Indians calculated a square root of 2, 1.4142156. 594 years ago, the Greek Solon reform, establishment of