Has the natural predator of human beings, who feed on humans, ever appeared on Earth?

Didn't show up. Because humans have been at the top of the food chain since their birth, scientists have not found any traces of the existence of human predators.

There should have been, but as humans evolved and developed to become the top of the food chain, the survival of the fittest naturally disappeared.

All animals on earth have natural enemies, so what are the natural enemies of humans? Yes, any animal on the earth has natural enemies, the so-called natural enemies, that is, who is born with whom they can't get along, such as cats and mice, what happens to mice when they see cats, it is conceivable that it is actually brine and tofu, one thing descends one thing, which is also the main operation law of the universe. As for the natural enemies of human beings, they are all kinds of bacteria and viruses that cannot be seen and touched by the naked eye, and it is not clear whether they are born with them, but as long as they appear, human beings will suffer a little bit, like this new crown virus is very powerful, and it has existed for a long time, and it is constantly mutating and mutating, specifically attacking humans.

The most important thing is human beings themselves, and what human beings create with their wisdom, to put it mildly, although they are in different societies, but there are all kinds of power in society, and there are complex human hearts and sinister human hearts, and people will die without war. Judging from the new crown virus in 2020, the smallest virus is the natural enemy of our human beings, the United States is so powerful that it doesn't even take any country in its eyes, but it has also been defeated under the attack of the virus, so it is said that all living things have the survival law of mutual restraint. For example, the new coronavirus, which is raging all over the world, can cause panic all over the world, and this virus is more intimidating than the natural enemies themselves.

It is foreseeable that the virus that is very harmful to humanity will not disappear, and we must always be prepared.

At the same time, some violent cosmic events, such as asteroid impacts the earth, supernova explosions, etc., can destroy humanity and even the entire earth in an instant! I believe that the natural enemies of humanity are natural disasters and human beings waging wars against each other. First of all, natural disasters such as **, floods or cosmic celestial bodies crashing into the earth, these disasters are difficult for human beings to resist, although human beings are very smart, life is very tenacious, but in the face of these natural disasters, our fate is not even ants.

Looking back, we human beings ourselves, of course, also belong to the animal genus, even if we are at the top of the advanced level, we also have the same commonality. That is, greed, because of greed, human beings cannot coexist peacefully, science and civilization can not synchronize, the result is that human beings have created a hydrogen bomb that is enough to destroy themselves, nuclear **, and it is worthy of the name to say that the natural enemy of human beings is themselves.

In fact, the natural enemies of human beings are all kinds of microorganisms, all kinds of bacteria, because this kind of thing is very difficult to see, and it will cause damage to the human body.

There are many, such as some animals, some plants, as long as they are poisonous, they are not very good for the human body, and human beings are also very fragile.

The natural enemy of human beings is the natural environment, and if there is no good natural environment, then it is impossible for human beings to survive.

Any animal on the earth has natural enemies, and there are many natural enemies of humans, and all animals that can attack and prey on humans are natural enemies of humans, such as tigers, leopards, lions, wolves, etc.

"Four evils".

The "four pests" refer to flies, mosquitoes, rats, and cockroaches. They all have one thing in common: they are extremely numerous. These four animals can never be counted by humans, and their distribution is almost worldwide.

Among them, mosquitoes are directly sucking human blood to transmit the bacteria and viruses they carry to humans, because of their large number, mosquitoes have become the world's most killing creatures, according to incomplete statistics, the number of people who die from mosquito-borne diseases exceeds 70,000 every year.

The natural enemies of humans are bacteria and viruses.

Both bacteria and viruses have one thing in common: they are extremely difficult to detect. They are not like the tigers and wolves that we see, because they cannot be detected with the naked eye.

Most of the reasons why we get sick are caused by bacteria and viruses, especially viruses, whose types are still a mystery because new viruses are constantly emerging. If we understand a creature, and know its hazards and habits, we can still find a way to deal with it in time, but for unknown viruses, if there is no timely prevention and isolation mechanism, then tragedy is inevitable.

For example, the smallpox virus that once swept the world and took countless lives, according to incomplete statistics, in Europe in the 18th century alone, smallpox took the lives of more than 100 million people. And the new coronavirus, which is so advanced in medicine, still takes the lives of millions of people.

The understanding of "people" in pedagogy.

Man is a possibility of existence. The essence of human beings is constantly generated in their own activities, and it is a kind of "self-regulation".

People are autonomous and creative. People not only learn, but also ask questions, explore, and innovate.

Human beings have the essence of development. The practical nature of human beings determines that human beings can continuously carry out self-denial, self-transcendence, and self-realization through conscious and purposeful independent creative activities, that is, human beings have the essence of development.

Human beings are historical and realistic. Two meanings: the essence of human self is gradually generated in the constantly developing history and real life, and people always live in the concrete historical and real space.

The generation and development of man's self-essence is subject to certain historical and practical conditions.

People are diverse and different. The possibility of human existence itself contains richness and diversity, and on the other hand, individual life is unique, irreplaceable and different between individuals.

Humans have no natural predators

We are proud that humans are at the top of the planet's food chain.

If human beings have natural predators, there is a species in nature that specializes in preying on humans, and the energy obtained by this species is even less than that obtained by humans, and it is difficult to maintain the survival and reproduction of this species with such scarce energy, and the result is only extinction.

Therefore, theoretically, perhaps in the early days, there may indeed be a species in nature that specializes in preying on humans, that is, human natural enemies, but the energy provided by humans is far from allowing this species to survive, and the result is only extinction.

Early humans may have had natural predators, such as ferocious beasts, and it was difficult for early humans to defend against beasts by brute force alone. However, with the increase of human brain capacity, especially learning to use fire, making tools, etc., the combat effectiveness of human beings has gradually improved, and the natural enemies of human beings will gradually become extinct, and human beings have stood at the top of the food chain with their super intelligence.

Humans have no natural predators, and we are proud to be at the top of the planet's food chain. But nature never bows to any species, and human wisdom seems insignificant in the face of nature.