英语作文关于人类形成的原因
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发布时间：2022-11-25 09:44
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时间：2023-10-09 07:14
Direct evidence for the study of human origins from the fossils, comparative anatomy anthropologists use methods to study various Australopithecus fossils and human fossils, determine their relative age and absolute age to determine the human fossils dating back years, the human evolutionary history of roughly divided into several stages. Geneticists are using methods of biochemistry and molecular biology, the study of modern humans, protein, deoxyribonucleic acid (DNA) of the difference between the size and mutation rate various apes and other higher primates, thus calculated the origin and differentiation of their respective age, currently, academics generally believed, into a human ancestor Australopithecus time 700 million years ago.
From the point of view of human fossils have been found in human evolution can be divided into the following four stages:
Australopithecus stage
Australopithecus have been found living in 4.4 million years ago to 100 million years ago. According to the study of fossil anatomical characteristics, different from apes, Australopithecus most important feature is the ability to walk upright bipedal.
Homo habilis stage
Before two million - 175 million years ago, Homo habilis fossils in East Africa since 1960 have been discovered in Tanzania and Kenya. The earliest life can exist 1.9 million years ago. The following subjects were classified as Homo habilis on the classification of people are such as to race (Homo habilis). Hotshots significantly expanded brain than Australopithecus, and are able to manufacture stone tools for material (stone), and then graally evolved into Homo erectus.
Homo erectus stage
People belonging to the genus Homo erect race (Homo erectus), referred to as Homo erectus, commonly known as the ape in the classification. Homo erectus fossils in 1891 was first discovered in Java, Indonesia. Was also caused controversy human or ape. Until the 1920s, have been discovered in Beijing Zhoukoudian Peking Man fossils and stone tools, Homo erectus was established position in the history of human evolution. Survival of Homo erectus 1.7 million years ago to about 20 million years ago. So far, Homo erectus fossils have been found in Asia, Africa and Europe.
Homo sapiens stage
Homo (Homo sapiens) are generally divided into early Homo sapiens (ancient Homo sapiens) and Homo sapiens (modern man). Early Homo sapiens 200,000 years ago to live in more than 10 million years ago. Homo sapiens survive era began about 10 million years ago. Its anatomical structure is basically similar to modern man, also known as the modern anatomy. Australopithecus is the earliest known humans.
