Do you know? Humans first kept animals in captivity, mainly for the enjoyment of princes and nobles, animal fighting and circus-like performances.
Until now, in addition to the pets kept separately by humans, the role of zoos, although still composed of ingredients for tourists to visit and appreciate, also shoulders the responsibility of protecting and promoting endangered and precious animals.
However, the irrational activities of human beings in the early days have brought extinct disasters to many animals, and some originally small numbers of animals and plants are endangered or even directly extinct, and the protection of zoos seems to have become the biggest proof of human beings' own jokes.
When human beings begin to learn to cherish every life in nature, we seem to hear the answer of the world, in recent years, some animals that have been "extinct" for many years have begun to "resurrect" frequently. Mayan prophecies?
Human definition of biological extinction is that when the entire population of an animal or plant has been destroyed, or has disappeared, or is unlikely to regenerate, the species can be said to be extinct.
In the overall development of the whole world, biological extinction is a natural thing. Just as every life is moving towards death from birth, every creature is also heading for extinction from the moment of birth, but the length of time varies. These are all inevitable consequences of natural selection and biological evolution.
For example, the large dinosaurs, great apes, megalodon sharks, etc. that disappeared in the long evolution of the earth, the five mass extinctions that occurred before and after were caused by the influence of nature.
It is either caused by climate change of a global nature, volcanic eruptions and the resulting long-term climatic anomalies caused by the movement of the Earth's crust, or marine anomalies or meteorite impacts, and each time it is a mass extinction.
Although these are still human speculations, it is certain that these extinctions were not deliberately committed by a certain species. However, when most of the earth's resources are used and mastered by human beings, the life and development process of these creatures is not simply limited to the natural world, but has to undergo a double test from nature and human beings.
When these laws of nature are imposed by humans, the process of biological self-development will be forced to disrupt, either accelerating its disappearance or flooding (biological invasion).
In the context of modern society, when human beings are looking for more precious creatures and beginning to pay attention to biodiversity, we find that many animals have become endangered or disappeared into nature.
For example, dodos, great cattle, thylacines, white-tipped dolphins and so on. From the 17th century to the end of the 20th century, more than 300 kinds of creatures disappeared from the earth forever in the more than 300 years of rapid human development.
But in recent years, we've sometimes seen news like "xx creatures appear in xx," with every time something like "Wow! Nature is magical", an exclamation.
The "flightless bird" white-throated buzzard has reappeared on the boundary of the submerged Aldabra Atoll; the silver-backed shrew deer that looks like a deer but is only the size of a rabbit and has disappeared for more than 30 years reappears in Vietnam; the hook-toothed rat that can release poison; the starry night spotted toad that has disappeared for more than 30 years, the Apapolis keyman more than 60 years ago, the Galapagos tortoise on Fernandina Island more than 100 years ago, and the coelacanth fish.
There are also plants such as large stone flower butterflies, heterophyllum moss, grunt rhododendron and so on.
These creatures, which have been unilaterally identified as "extinct" by humans, are gradually returning to the public eye, as if they were "resurrected" from ancient times. Surprises are accompanied by new thinking, such as why and why they reappear?
The once mysterious Mayan civilization predicted many, many things in the world. For example, the end of the world, which is the five cycles of destruction and rebirth on Earth, they use "solar epoch" to represent these times, and the cycle of each solar epoch is about 26,000 years.
According to this cycle, 2012 on Earth is the fifth solar epoch, and human civilization will end here, so does the frequent return of living things confirm the truth of the Mayan civilization's predictions?
Not. Because the truth is that the "prophecy" about the "end of the world" does not seem to have come true. Therefore, some people also think that this is a mistake in understanding, and 2012 is not the end of world civilization, but the beginning of a re-cycle of calculations.
It is true that the evolution of living things in the world has always had some kind of "disappearing and repeating" cycles, but this is also a set of ways in which nature repairs itself. Like the previous mass extinctions, life is always recurring in a constant cycle of reincarnation.
Nature changes every day, animals will adapt to changes in the environment, and there will generally be no accidents related to the survival of the race.
However, with the development of society, the expansion of human cities and the drive of interests, many animals can not escape the threat of extinction, a large number of animals take the initiative to stay away from human habitat, hidden in more deep forests and more barren wild.
The extinction of organisms sometimes has limitations in discovery and differences in understanding, which can easily lead humans to unilaterally identify a result.
That is to say, living creatures may divert their long-standing geographical space, or they may only temporarily "hide", they actively leave the human eye and the area of activity, living in the world where they can wander freely, rather than under the intentional "gaze" of human beings.
Because it has not been discovered by humans for a long time, it has created an illusion that "this species is extinct"; at the same time, human activities are also limited, it is impossible to really step on every inch of the earth, there will always be a habitat for organisms that cannot be found.
As a result, human assumptions about the "extinction" of a species may not be correct.
However, when these animals are still willing to return to the vast world, and human beings are really surprised by this, they are all looking forward to the symbiosis and coexistence of all things, which also shows that human governance of the environment may also play a certain role.
So, while we fight for more living space, please reserve some "private territory" for other creatures as well!