目前科学家经过研究后推测我们现在所居住的地球约在46亿年前诞生,一直到新生代第四纪的更新世,也就是约180万年前的冰河期时代,才开始有猿人出现。根据一些化石的研究,科学家认为人类一直到距今12000年前的全新世,也就是最后一次冰河期开始衰退并趋于结束时,才开始有所谓的社会生活及文明存在,但这些文明似乎都停留在新石器时代。现代人类历史时期的定义是根据五千多年前开始留下的文字符号所保存 At present scientists have speculated that the Earth we live in was born about 4.6 billion years ago until the Pleistocene Quaternary Pleistocene, that is, about 1.8 million years ago, the glacial period before the emergence of ape-man appeared. According to some fossil research, scientists believe that until the Holocene 12,000 years ago, that is, when the last glacial period began to decline and tended to end, the so-called social life and the existence of civilization began to appear, but all of these civilizations seem to have Stay in the Neolithic Age. The definition of modern human history is based on the text symbols left over 5,000 years ago