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For the development of life on the earth, this is really a very long time, even we humans have a lot of secrets that we don't know about the early development of the earth, especially the relationship between living things, people will wonder what are the species that have been eliminated and disappeared by nature from ancient times to the present? In fact, there are too many, for example, the group of dinosaurs is a typical example, let's analyze it in detail.
First of all, in the early days of the earth, there were a lot of resources on the earth, at that time, they were all creatures in the ocean, and then because the competition pressure of organisms in the ocean was too great, and the relationship between survival was too complicated, so some creatures came to the land and began their own development, and slowly land creatures appeared, and a lot of land creatures appeared, including a lot of resources on land, so the development was more and more, and the dinosaurs, the overlords of the earth that everyone knows, appeared. If you say that other species are really not the opponents of dinosaurs at all, even if they are lions and tigers, they still do not have any combat effectiveness, in front of dinosaurs.
There are many such existences, and there are many species, such as swimming in the ocean, flying in the sky, and running wild on land, such as the classic representative Tyrannosaurus rex.
The combat effectiveness is simply unable to find the existence of the opponent, but the great changes in the environment on the earth caused by the fall of the asteroid directly led to the fact that the dinosaurs could not use such an environment and were directly eliminated.
But that's the law of nature, Darwin.
The proposed "biological evolution theory", only to adapt to the change of the environment can develop and survive, otherwise everything is extinction, for human beings, we are the most advanced creatures on the earth, with great ability is because the ability to adapt to the environment is very good, and even can change the environment to a certain extent, this is our best place.
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The dodo became extinct in 1681; The Sprout manatee in the Bering Strait became extinct in 1768; Moa became extinct after 1800; The white-footed Australian woodrat became extinct in the early 19th century; The West African lion became extinct in 1865; The Atlas brown bear became extinct in 1870.
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The magnificent fate of the lonely George can be described as the extinction story of the "perfect" species. Appearing in a charismatic image and spending a lonely life with a high-resolution face is a tireless effort by naturalists to have children.
The population of sea turtles on the island of mesa declined dramatically in the 19th century due to the hunting of whalers. Hungarian zoologist Josef Bhagwoj discovered the solitary George in 1971 and has not found any other flat-topped turtles since keeping them in captivity.
In 1996, the International Union for Conservation of Nature (IUCN) declared the species extinct in the wild, and researchers attempted to breed the solitary George with other members of his kind. At least some genetic material has been preserved.
The lonely George could not escape his natural death in the end, but gave rise to a long history of news coverage about his life and cultural heritage, which remains forgotten to this day. If the bumpy fate of the lonely George above is not the typical extinction story.
Now, there is a more typical crisis of mass extinction here. At the beginning of the 21st century, the hill, inhabited by a cement company, was wiped off the map because of its valuable mineral resources, and this "microscopic gem"-like snail eventually became extinct.
Scientists speculate that species are going extinct 1,000 times faster than expected, with dozens of species going extinct every day, to be exact.
This rate of extinction does not mean that the extinction of large and rare animals that can be kept in zoos is accelerating, and the victims of most species extinctions may be invertebrates, plants, and other creatures that may not be of much interest to humans.
But calculating the actual extent of the extinction crisis is very difficult, and researchers have only cataloged less than 2 million of the 5 million to 1,000 species that may house the planet.
The IUCN's Red List lists only 1,000 species that are extinct or extinct in the wild.
But there are other science** that speculate that 7% of existing known species would be extinct if extinct invertebrates were included.
Below is a list of species declared extinct by the IUCN that have been declared extinct in the last 10 years, which have been declared extinct in the wild, but still do not include species that you can often hear about.
There can only be about 160 species on this list, many of which were discovered not long ago or recently.
In general, researchers declare that it takes decades of time and professional search work to fully determine that a species is extinct, and that the extinction of a species itself may be an act of abandonment of that species.
Even worse, once some species are deemed extinct, policies and financial guarantees for habitat conservation may no longer be recognized. Linking these nearly 160 extinctions, this extinction trend more generally reflects the biodiversity crisis.
The IUCN list of extinction species and causes of extinction may be even more important. To produce this list, the IUCN Red List was evaluated by scientists as extinct in the last 10 years, and extinct species were removed from evaluations over the past few decades.
In addition, the list summarizes species types, habitat areas, causes of extinctions, and when they occurred.
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The Xinjiang tiger, which became extinct in 1980 due to habitat destruction, and the Chinese rhinoceros, declared extinct in 1957 because of overhunting by people.
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In the intervening decades, species such as the white-sided dolphin, the golden toad, the Hawaiian crow, the Seychelles snail, and the scimitar-horned oryx have become extinct.
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In the past decade, Hawaiian crows, white-sided dolphins, West African black rhinos, golden toads, Liverpool pigeons, Pyrenees goats, German small birds, etc., have all become extinct.
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The most famous is definitely "Lonely George", George is the last flat-topped turtle in the world, and researchers tried their best to make the flat-topped turtle possible to spread offspring, but failed.
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From ancient times to modern times, there are many species that have been eliminated by nature and disappeared, and the five mass extinctions in ancient times were basically eliminated by nature. Some are evolutionary failures, and some are defenseless in the face of natural disasters. Under the influence of nature, the species that are eliminated are considered to be eliminated by nature.
As long as it conforms to the laws of nature, even a species that has been eliminated by humans can be regarded as natural elimination.
1. The first mass extinction of five species was at the end of the Ordovician, and the main reason was the advent of the ice age, and many species could not bear it, so they were eliminated by nature. At that time, about 85% of the species were extinct; The second mass extinction was in the late Devonian period, when vertebrates, reptiles, and amphibians began to appear. The third extinction was the Permian, when 96% of species went extinct due to changes in temperature that caused sea levels to rise and the oceans to become hypoxic; The fourth was the Triassic mass extinction, which was about 76% extinct; The fifth time was at the end of the Cretaceous period, and the extinct creatures we are more familiar with, that is, the dinosaurs that ruled the earth, were all extinct.
2. Human InfluenceMany people will mention humans when discussing species extinction. I think it's because of human influence that the extinction of the species is caused. It can indeed be said that this is the case with human behavior now.
However, early human beings were only for survival and reproduction, and other creatures were extinct, which also conformed to the law of "survival of the fittest". Therefore, the creatures that were extinct due to the emergence of humans in the early days can also be regarded as a state of natural extinction. Even if it's about humans, it's a matter of ecological balance, and the same thing happens when other animals are at the top of the food chain.
In the early days, the representative animals were the two-meter-tall kangaroo in Australia, and in recent times, they are represented by the dodo, the spotted donkey, etc.
3. Evolutionary failureSome species extinction is due to the influence of the environment, while some are affected by humans, but there are also some species that are caused by their own death and evolution. A species may evolve into different organisms, some that can adapt to the natural environment and others that cannot. And those who can't adapt to the environment are those who have chosen the wrong direction of evolution, such as some dinosaurs that choose to slide, which basically belong to the evolution of death.
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And we human beings from the beginning to the present is too hundreds of thousands of years, in this short period of hundreds of thousands of years, we human beings have achieved the domination of the earth, and this is what we need is the IQ of our human beings, because these IQ allows us to correctly use other substances in nature, and use them to defeat those creatures that are stronger than us, in the process of using these substances, our human activities have also made many creatures extinct, because the scope of our human activities is too large, As a result, there is no place for these creatures to move.
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The extinction of species is partly caused by humans, but most of it is a natural phenomenon of elimination, because of the principle that these species have historically survived as the fittest.
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The extinction of species is not all caused by humans, but also because of natural elimination, because they have no way to adapt to the changes in the environment, so they will be eliminated by nature.
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Because human beings have not evolved a smarter brain, they can't build the most efficient social form, they can't compromise with others well, and they can't make friendly use of nature, but there is no way to do it, and scientists have been trying to solve these bad phenomena. Old species are dying out and new ones are being created. <>
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This question can go up, if our universe is destined to evolve from order to disorder, then what about the original order from **? It's like water always flowing down, so doesn't all the water run out in this way? How can it continue for so many years?
The problem with water is that the water vapor evaporated by the ocean can be returned to the continent by the wind. In other words, fresh water is actually a big cycle. In the same way, the evolution of living things, and even the order of the universe, should be a big cycle.
Because if you just go in one direction, you shouldn't have a beginning. In other words, species decline is a current trend, but if we broaden our horizons and increase hunger on the time scale, the species will inevitably grow even bigger. Even the universe will inevitably return to order again.
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The Origin of Species is a very good book, but unfortunately I haven't read it. To be serious, many species have gone through a long period of time, ups and downs, and eventually some evolved, some regressed to disappear, and even disappeared and reappeared? What's going on?
The first is called coelacanthNeedless to say how many years it is, it must be very long. It is believed that it disappeared more than 60 million years ago, and the last time it appeared was in the 20th century, this was in other countries, and no traces of this fish have been found in our country.
The second type is called the small-toothed civet, like the cute kittens you usually see, they are also very small. Extinct in the 20th century, it reappeared in 2011, and this is not on our side, although there are many types of kittens in our country.
The third species is the Lord Howe Island stick insect in Australia, which reappeared less than 70 years after it became extinct. There are many individuals in the normal population, but there are only about 20 of them, and this is not a creature in our country, only in Australia.
The third species is called guinea deerIn the past, there were many in our country, but because there was no restriction on hunting, it led to extinction. Luckily, one was spotted in 2007, and it was a female. This one is from our country, called the Chinese guinea deer.
It's hard to imagine what you haven't seen before. But fossils are a favorable trace for scientists to judge what it looks like. After hundreds of millions of years of evolution, it will leave an imprint on the surrounding sediment, which will be turned into stone, that is, fossils.
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I only know that there are animals whose numbers have increased from a small number to a small number, and I really don't know about this.
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Metasequoia can be counted as one, disappearing for tens of thousands of years. The current metasequoia is the descendant of the only tree that was discovered later.
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The first is dinosaurs, carnivorous dinosaurs may feed on humans, and herbivorous dinosaurs will compete with humans for living space.
Secondly, grotesque insects, usually a small insect will be afraid, let alone a huge poisonous insect.
Finally, there are underwater creatures, such as the spiral tooth shark, whose teeth are arranged in a spiral shape, and the bite must have the skin and flesh open and the flesh blurred.
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For example, if the dinosaurs were not extinct at that time, human beings may not be able to survive, because the dinosaurs were too large and very violent, and it was difficult to control, and if the dinosaurs existed, it would be a hidden danger to humans.
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