古巴比伦、古埃及、古代中国、古印度是人类文明最早诞生的地区。在幼发拉底河和底格里斯河、尼罗河、黄河、长江流域以及印度河、恒河流域相继产生了世界四大文明。四大文明古国都有自己的历法,一年都分12个月并且有闰月。各个文明都创造了自己的文字。埃及和两河流域都计算了圆周率,巴比伦和中国都发现了勾股定理,印度则发明了阿拉伯数字。中华文明于5000多年前起源于黄河、长江流域, Ancient Babylon, ancient Egypt, ancient China, ancient India is the earliest birth of human civilization region. In the Euphrates and the Tigris, the Nile, the Yellow River, the Yangtze River and the Indus, the Ganges have produced the world’s four major civilizations. The four ancient civilizations have their own calendar, 12 months a year and have a leap month. All civilizations have created their own words. Both Egypt and the two river basins have calculated pi, both Pythagorean theorems have been found in Babylon and China, and Arab numbers have been invented in India. Chinese civilization originated in the Yellow River 5000 years ago, the Yangtze River,