Lead
For a while, a hot topic appeared in the foreign media: "prehistoric civilization" - some even called it "alien civilization", and if scientists on the mainland did not miscalculate, the matter would be even bigger.
What makes scientists so confident, and what are the clues to the mainland?
In conjecture, it is better to look at the "evidence" first, and then consider whether people really need to be vigilant.
1. Trilobites.
Trilobites lived in the Cambrian period, long ago, and due to the abundance of trilobite species, quite a few trilobite fossils can be found all over the world.
In the research of scientists, a scientific team composed of trilobite fossils found a strange specimen: the trilobite fossils were actually imprinted with human footprints, which seemed to have a small stone buckled on the heel!
2. Nuclear reactors.
100 kilometers south of Chicago in the United States, in 1942 an American expedition discovered a strange natural rock mine that emits intense radiation.
It has been confirmed that the uranium content in this rock mine is abnormally high, and even has reached a level where the uranium content of nuclear reactors has not reached during the mine's only short existence.
Not only the uranium content, but also the uranium-191 in the nuclear reactor has never been found in previous natural uranium exploration.
In 1942, the American "Manhattan Project" more or less dropped a "small mine" here - there is a nuclear reactor on this land in South America, and it is not a short time.
3. Ancient bolts.
In the early 60s of the 20th century, when an Indian steel company was mining ore, it accidentally "overturned" a boulder, so a "monster" with thorns and a roar crawled out of the boulder, and finally became docile and well-behaved, and was regarded as a "friend" by scientists.
This "monster" has no head and no feet, but it has a 1.5-meter-long round steel pipe on its body, which looks almost like a bolt, hence the name "ancient bolt".
Locals say that this "ancient bolt" was the finale of the memeda dug by the defenders of prehistoric civilizations, but scientists have a different opinion: the roots of the ancient bolt are the remains of some kind of creature.
Since this "ancient bolt" is all a fossil of echinoderms, the muddy geological age around it is very old, it is said to be 300 million years old.
How did the "human footprints" on trilobite fossils come about?
The trilobite is unprecedented in number and breadth, and the seemingly bizarre forms are extremely abundant, and the threat between different species is just a "small minion", but the real situation is not the case.
In the age of trilobites, the environment in which the species adapted was relatively stable, and in order to avoid competition, different species of trilobites often chose different lifestyles, and some even chose to live in completely different ways.
So, if it weren't for the fact that the fossils were found in the same strata, scientists would easily think of this colorful "trilobite community" as a living organism, a community of things that also live together, or multiple subgroups of the same species and different types of animals.
This group of fossils in the "Trilobite Fossil Community" is the "human footprints left by humans" in this special "community".
The characteristic "human footprints" in trilobite fossils are actually rock formations called lithofacies, which were formed by various natural environments such as monsoons, tidal currents, and rivers.
The natural process by which this lithofacies is formed is very simple, as with modern animal footprints, when an organ of one size of an animal leaves footprints in a certain place, it may form a geological phenomenon called imprints after a certain period of time.
If the "human footprints" found in the trilobite fossil community were really stepped on by humans, then the geological age around the trilobite fossils cannot be so ancient, because the prehistoric imprints and fossils must be relatively close to the age of the fossils, and the trilobite fossil community cannot be so colorful.
Is it really possible that a nuclear reactor existed 2 billion years ago?
Impossible.
The age of the earth is only 4.5 billion years, and this nuclear reactor is only 2 billion years old, and if an ancient civilization with advanced prehistory and technology really exists, it should not be just such a nuclear reactor.
In fact, uranium-191, a stable isotope found in nuclear reactors, is naturally impossible.
There are many theories about the existence and state of nuclear reactors that are inappropriate, but the ore produced by nuclear reactors is very similar to the products produced by natural nuclear fission: the phenomenon of naturally occurring nuclear fission was discovered as early as when Mendele Chab and Curry studied the radioactivity of sodium iodide and uranium from iodine ore.
When the neutron hits its nucleus, the nucleus is excited into high energy, and then reacts with the surrounding nuclei to form a chain reaction to produce radiant matter.
The ore under the nuclear reactor contains a large amount of uranium, which leads to the high temperature inside the nuclear reactor and the neutrons brought by the water, which can meet the conditions for nuclear fission.
As a product of nuclear fission, there is nothing wrong with uranium-191, but the uranium in the nuclear reactor is anomalous because of its short-lived isotope uranium-192, which is a very attractive raw material for nuclear reactors, uranium-238 with only one pair of neutrons less neutron is a very attractive raw material, but uranium-238 has a half-life of 4.5 billion years, and only a nuclear reactor can complete this half-life to prove that it has prehistoric technology.
Did ancient bolts really exist 300 million years ago?
There were indeed echinoderms 300 million years ago, and at this time, echinoderms were relatively herd, so they also had their own names.
The outermost shell of this "ancient bolt" is the surface layer, and the long steel pipe in the middle is the "bolt".
The material composition of this stone is exactly the same as that of echinoderm fossil chips.
III. Conclusion
The age of the earth is so long, we humans can barely live for hundreds of years, so there is no doubt that it is difficult to understand the "traces" left by prehistoric civilizations in our short lives.
However, there is no doubt that 300 million years of history is enough to form these "traces", so the existence of prehistoric civilizations on Earth is possible, but there is no definite scientific evidence yet.
When you read the news or hear the rhetoric of the hunt, you must keep a calm heart.
Science is science based on evidence, and "science" without evidence cannot be true science.
The work of scientists is to verify the conjectures of previous people who have no evidence, and dig out new knowledge that has not been discovered.