How many years have humans been around so far? How many years have humans existed?

According to scientists' estimates, the age of the universe is about 15 billion years. The earth, on which human beings depend, has been rotating in the universe for 4.6 billion years. The history of living things is at least 3.3 billion years, while the history of humans is about 3 million years.

The Archean period, about 3.3 billion to 2.5 billion years ago, was the beginning of life. In the middle of the Archean period, the earliest organisms, prokaryotic cells, appeared. About 2.5 billion years ago to 600 million years ago, the Proterozoic period, life began to flourish.

In the early Proterozoic, eukaryotic algae appeared, and in the late period, primitive coelenterates, mollusks, and arthropods began to appear.

About 600 million years ago, the Paleozoic Era, 100 million years ago, was the era of biological greatness. Cambrian of the Paleozoic Era.

about 600 million years ago), invertebrates appeared, and seaweed began to flourish; In the Ordovician period (about 500 million years ago), vertebrates appeared, and marine invertebrates began to flourish; In the Silurian (about 100 million years ago), fish appeared and plants began to land; In the Devonian period (about 400 million years ago), amphibians appeared and fish began to flourish; Primitive reptiles appeared in the Carboniferous period (about 100 million years ago), and amphibians began to flourish; In the Permian period (about 100 million years ago), it appeared similar to that of mammals.

of reptiles. About 100 million years ago - 70 million years ago, the Mesozoic Era was the age of reptiles. The earliest dinosaurs appeared in the Triassic (about 100 million years ago); Jurassic.

About 100 million years ago), the earliest mammals and birds appeared, gymnosperms flourished, and dinosaurs flourished; Cretaceous.

About 100 million years ago), marshals with marsupials and placentas appeared, the earliest flowering plants appeared, and dinosaurs dominated the world. The Cenozoic Era, which is about 70 million years ago, is the era of mammals and humans. In the Paleocene (about 70 million years ago) of the Tertiary period of the Cenozoic Era (about 70 million years ago to 3 million years ago), advanced mammals were born; The earliest primates appeared in the Eocene (about 60 million years ago).

In the Oligocene (about 40 million years ago), monkeys and apes arose among primates; During the Miocene (about 25 million years ago), Australopithecus spread across Eurasia; By the Pliocene (about 12 million years ago), Australopithecus gradually transformed into humans. The Quaternary period of the Cenozoic Era (about 3 million years ago to the present) is the era of mankind. In the Pleistocene of the Quaternary (about 3 million years ago), hominids began to evolve into modern humans.

Humans developed from the higher primates of Australopithecus. Humanity goes through four stages of development after becoming a fully formed person. One is the early ape-man, also known as the capable man.

Appeared between 3 million and 2 million years ago. The second is the late ape-man, also known as Homo erectus. Its age ranged from about 1.8 million to 230,000 years ago.

The third is early Homo sapiens, also known as the ancients. It lived between 200,000 and 40,000 years ago. The fourth is Late Homo sapiens, also known as Homo sapiens.

Appeared 40,000 years ago to the present. Late Homo sapiens is modern humans.

The number of years humans have existed is difficult to verify, as there is growing evidence that humans existed a long, long time ago. At present, scientists believe that there are 7 million, 9.5 million, or even more than 10 million years of human existence.

How long have humans been around?

Humans have been on Earth for 6 million years.

In the 4.6 billion years since the birth of the earth, human beings have been the only highly intelligent civilization on the earth. Humans began to evolve 6 million years ago (6 million-year-old proto-humans were discovered in 2000), and civilization appeared 1 million years ago. Dinosaurs have been on Earth for 160 million years.

Humans have been on Earth for less than a fraction of the time when dinosaurs dominated the planet.

In 2000, a 6 million-year-old fossil of the original number of people (Tugen Man) was found in the Tugen Mountains of Kenya, Africa, so humans appeared in the Cambrian period more than 6 million years ago, and Homo sapiens first evolved 200,000 years ago. It has only been 60 million years since humans created writing, and less than 300 years have passed since the rapid development of technology such as electricity.

About 80 million years ago, the common ancestor of primates, including humans, lived in the same era as the dinosaurs. It wasn't until 60 million years ago that Australopithecus began to appear. More than 50 million years ago, primates differentiated from lower primates, protomonkeys, to higher primates.

33 million 24 million years ago, apes arose from the monkeys of the Old World.

100,000 years ago 3 million years ago, in the ape stage, humans at this time were still in a very primitive state, using sticks and stones, and making simple tools; 30,000 years ago 100,000 years ago, in the primitive stage, the level of human beings at this time greatly improved the level of tools, and learned to use fire, which was a very great progress for human beings; 10,000 years ago 30,000 years ago, human beings were in a primary primitive society and began to have a certain hierarchical differentiation; 5,100,000 years ago, human beings entered a high-level primitive society, and initially entered a slave society, and writing began to appear; 3,500 years ago, mankind entered a slave society, states began to appear, and writing was more mature; 500 3000 years ago, mankind entered a feudal society.

Broadly speaking, it has been around for 5 million years.

Summary. Hello dear. Humans have been around for 3 million years.

Hello dear. Humans have been around for 3 million years.

According to scientists' calculations, the age of the universe is about 15 billion years. The earth, on which human beings depend, has been rotating in the universe for 4.6 billion years. The history of living things is at least 3.3 billion years, while the history of humans is about 3 million years.

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It is understood that the origin of humans can be traced back to the African region about 7 million years ago, and the emergence of human Homo sapiens was about 300,000 years ago. It has been about 300,000 years since the emergence of human Homo sapiens. However, the history of human civilization and the record of history are only about 6,000 years, and the development of human science and technology has only achieved rapid development in modern times, in this regard, it can be said that human beings have existed for 300,000 years, but the development of human civilization and science and technology is relatively short.

How many years have humans existed.

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It is understood that the origin of human beings can be traced back to the African region about 7 million years ago, and the appearance of human Homo sapiens macro was about 300,000 years ago. It has been about 300,000 years since the emergence of human Homo sapiens. In this regard, it can be said that human beings have existed for 300,000 years, but the development of human civilization and science and technology is relatively short.

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In addition, from another point of view, the existence time of human beings can also be considered from the perspective of human evolutionary history and life history. According to scientists, the age of the Earth is about 4.6 billion years, while the earliest life forms date back to about 3.5 billion years ago. Humans, on the other hand, are one of the higher organisms, evolving into modern humans in about 2 million years, while human civilization and history are recorded for only a few thousand years.

Therefore, from the perspective of life, the existence time of human beings can be said to be short-lived, but during this time period, human beings have left a deep imprint on the earth and have had a huge impact on the earth's ecological environment, civilization process and scientific and technological development. <>