The earth has a long history of 4.6 billion years since its formation, and its life time has reached several billion years. It is highly possible that prehistoric civilization preceded human beings. We cannot blindly deny the existence of prehistoric civilization on the basis of limited scientific research at present. And traces of prehistoric civilization that scientists can't explain are also found all over the world. Although these evidences are too old to be absolutely convincing, they can still strongly prove the existence of advanced civilization in prehistoric times. Limited to space, we can only list some evidence left by prehistoric civilization. Let's take a look at them.

At present, several prehistoric nuclear remains have been found in India and Africa, and some unexplained huge ancient city sites have also been found in other parts of the world. Divers also found prehistoric city ruins that sank to the bottom of the sea. What's even more surprising is that scientists even found human footprint fossils in the dinosaur era, and some human footprint fossils were also found at the same time as dinosaur footprint fossils, which shows that prehistoric humans actually existed in the era of dinosaur life, at least a humanoid creature with a footprint highly similar to human beings.

Dinosaur Valley The famous dinosaur valley is located in Texas, USA. It is a sacred place for scientists to study prehistoric creatures and dinosaurs. Many dinosaur fossils have been unearthed here. Besides some dinosaur footprint fossils, very clear human fossil footprints have also been unearthed. Of course, these footprints have also been studied and analyzed by many scholars, who think that only humans can tread such footprints, but these human footprint fossils were formed 65 million years ago or even longer, which shows that our understanding of life forms in the dinosaur era is far from enough.

Trilobite fossils and human footprints In addition to human footprints and dinosaur footprints, scientists have also found evidence that human footprints and trilobites are on the same fossil in the Antelope Fountain in Utah. Trilobites, an ancient creature, only existed in the world 300 million years ago. On this fossil, human shoe prints just stepped on a trilobite. Obviously, human shoe prints and trilobites are of the same era, indicating that human beings probably existed 300 million years ago.