After Darwin published the theory of evolution, we have always believed that the existing human beings evolved from ancient apes. Archaeologists and anthropologists discovered the earliest human ancestor fossils about 3 million years ago. Geologists basically determined that the earth was born 4.5 billion years ago according to the earliest earth rocks that can be found at present. What is even more puzzling, however, is that scientists found human footprints in the strata more than 500 million years ago. These findings are incredible and well documented.

Paleolithic people who lived 65438+ 10 million years ago are considered to be real earthlings in history. However, fossil evidence tells people that human ancestors first appeared 3 million years ago. This huge time difference is almost unbelievable. Therefore, some people put forward the theory of earth civilization cycle. Biologists infer that in the 4.5 billion years since the birth of the earth, life on the earth has experienced five extinctions from scratch, namely 500 million years ago, 350 million years ago, 230 million years ago, 65.438+0.8 billion years ago and 65 million years ago.

We might as well make an interesting calculation, that is, we compress the whole history of the earth and human beings into 1 year, and every second of this year is about 140 years of the earth's history. Then the earliest ancestor of mankind was born on the last day of this year 1, that is, around the 365th day 18: 30. The existing written history of mankind appeared at the last 1 minute of the last day, that is, around 23: 59: 30. Modern civilization, marked by the British industrial revolution, is now less than 2 seconds.

Undoubtedly, this calculation makes us deeply realize the brevity and insignificance of the existing human history. Is it 364 days 18 hours before the birth of human beings, or in the long geological age of 4.497 billion years, the advanced intelligent creatures on the earth are really blank? Is it possible for advanced intelligent creatures like human beings to exist before us? Some scientists believe that this possibility exists.