How long have humans been around, how long have humans been around

How long have humans been around?

Humans have existed 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 Homini d'hominus (Homo tugen) was found in the Tugen Mountains in Kenya, Africa, so humans appeared in the Cambrian period more than 6 million years ago, and Homo sapiens began to evolve 200,000 years ago. The civilization of human beings to create writing is only 60 million years old, and the rapid development of technology such as electricity is less than 300 years.

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.

Human evolution: Human evolution originated from forest apes, and developed step by step from primates through a long evolutionary process. It has gone through four stages: ape man, primitive man, sapiens man, and modern man. <>

When humans exist to the point of non-existence, this fear is meaningless.

Humans were born 5 million years ago, about 4.5 million years ago, humans and apes began to diverge, giving birth to Australopithecus, which later evolved from Australopithecus 2 million years ago, and further developed into modern humans.

Humans are classified from the animal kingdom, and taxonomically they belong to the subphylum Vertebrates, Mammalia, Primates, Anthropoids, and Homo. Based on the fossil material of Australopithecus and hominin that has been discovered, the earliest humans may have appeared 3 million or 4 million years ago.

Theoretically, the process of human origin is divided into three stages, namely the stage of apes, the stage of man and ape, the stage of man who can make tools, and the later stage includes the two major periods of ape and Homo sapiens, which are divided into two stages: early and late.

The early ape-man stage, which lived between 3 million and 1.5 million years ago, already possessed the basic characteristics of humans, such as the ability to walk upright and make simple gravel tools.

The late ape-man stage, about 2 million to 300,000 years ago, has a human-like body and a large brain, which can make more advanced paleolithic tools and begin to use fire, such as the Peking ape man in Zhoukoudian, Beijing, China.

The early Homo sapiens (hominis) stage, 10-200,000 to 50,000 years ago, gradually broke away from the characteristics of apes and was very close to modern humans, such as Neanderthals in Germany.

Late Homo sapiens (new man) stage, about 4-50,000 years ago, the evolution of human beings at this time has accelerated significantly, in the form has been very similar to modern man, in culture, there has been the art of carving and painting, and there are ornaments, such as the Zhoukoudian Keel Mountain Cave Man discovered in 1933, at this time primitive religion has been produced, has entered the matriarchal society, in the late Homo sapiens stage, modern man began to differentiate and form, and distributed to all parts of the world.

Can't be sure.

Humans have been living on Earth for 2.4 million years.

2.4 million years ago, Homo sapiens appeared on the ancient land of Africa, the first creature that could be called human. After more than two million years of evolution, Homo sapiens differentiated into a variety of prehistoric humans, including Homo erectus, Homo heidelbergensis, and Neanderthals.

By 250,000 years ago, Homo sapiens had evolved. Homo sapiens eventually survived the brutal competition for survival and became the only species in the genus Homo, and humans on Earth today are considered descendants of Homo sapiens.

As early as 4 billion years ago, life probably evolved on Earth. Life on Earth has been uninterrupted for billions of years. But no species can exist on Earth forever, and with the continuous change of climate and environment, life on Earth has changed one after another, and the number of existing species on Earth accounts for only 1% of what has appeared.

After each mass extinction event, species on Earth undergo a major reblemire, with new species replacing old ones. The few surviving species quickly occupy the previous niche, which gradually evolves into new species. Although there is no shortage of life on earth, there is a great shortage of those that can survive.