The Earth was born at the beginning of the formation of the solar system 4.6 billion years ago. After .8 billion years, life gradually appeared from the ocean. It has a history of 3.8 billion years, but no creature can continue to flourish on the earth.
They are either forced to extinction by natural disaster , or gradually eliminated in evolution, and in the end they all go to a disappearing end. Does this mean that humans will follow their footsteps one day?
Some people say that those extinct animals have not produced higher civilizations and can only follow the trends of nature. The technology developed by humans is enough for us to change our destiny. If the earth is not suitable for human survival, move to other planets to allow civilization to continue forever. Is this really the case with
?
In the 1990s, in order to prove that humans can also simulate natural ecosystems, scientists spent a huge amount of money to build Biosphere No. 2. locked 4 men and 4 women in this closed system , trying to copy a reduced version of the earth's ecosystem, but the experimental results were unexpected.
Biosphere was proposed by Austrian geologist Edward Sius in 1875. is the general term for the earth's surface organisms and natural environment. Some scholars have become very interested in whether humans can establish an ecosystem like the earth on alien planets, and began to design the Earth's ecosystem No. 2 in 1984.
The entire ecosystem was built by billionaire Ed Bass for US$200 million. It is built in the middle of the desert in Arizona, USA, covering an area of 13,000 square meters, and consumes 80,000 steel bars and 6,000 fast glass, forming a world completely isolated from the outside world. Imitating the ecological environment of the earth, scientists have invested more than 4,000 organisms in the ecosystem, including animals and plants, as well as microorganisms and bacteria, and even simulated various natural environments on the earth such as swamps, deserts, oceans, and grasslands. After the completion of
, the scientists did not let the experimenters move in immediately, but first cultivated the plants and used photosynthesis to make oxygen , so that the oxygen concentration reached the normal level of nature. Everything was ready, but the east wind was not there. In 1991, scientists selected 4 men and 4 women to enter, and planned to live a self-sufficient life in the ecosystem for two years.
At the beginning, everything went smoothly. The experimenters thought the environment here was very good. Not to mention two years, there was no problem in eight years. However, just one month later, the oxygen concentration in Biosphere 2 began to drop sharply, and fell from the original 21% to 16% , far below the safe range.
This caused a large number of organisms to die, and the plants also died. In order to ensure the safety of the experimenter's life, the biosphere began to input oxygen from the outside , which allowed the experiment to proceed.
But the environment continues to deteriorate. In a closed environment, conflicts between the experimenters continued to occur, and serious conflicts arose. What made scientists even more puzzled is that as long as the oxygen is stopped transporting to the experimental circle, the oxygen concentration inside will steadily drop by 0.25 every month. They can't even find who was consuming oxygen.
Finally, the experiment, which was originally planned for two years, was forced to terminate in the 21st month. At this time, Biosphere 2 was completely different from the beginning of the experiment. The original vitality of became lifeless, and the air was turbid. A large number of animals and plants in died or even extinct.
This made scientists realize that we seem to never be able to establish an ecological environment like the earth on other planets. In other words, we will never be able to do without the earth , and the earth's energy will be consumed one day. What's more important is that the earth's environment is also deteriorating. If this continues, it is already a foreseeable thing for humans to move towards mass extinction in the future.
In the history of the earth, there have been 5 mass extinction events in total
Among them, Permian is the most serious, and about 90% of the organisms are permanently extinct. The history of the earth's biological development is almost cut in half. From the time of several mass extinctions, it can be seen that they do not seem to be caused by some accidental reason. is an event that occurs periodically every 50 million years to 100 million years. We have just passed 55 million years since the last mass extinction and are in the cycle of the sixth mass extinction.
Most people believe that global warming is the prelude to the sixth mass extinction. Looking back at the past five mass extinctions, two of them were global cooling. once was volcanic activity, and the other was meteorite hitting . No one has been a mass extinction caused by global warming, so many people believe that we are the protagonists of extinction caused by global warming.
Even if it is not extinct due to the natural environment, human beings may also go towards self-destruction. Biologist John Calhoun once created a utopia of mice. cultivated a group of mice in a limited space and provided them with unlimited food and water. He originally expected that these mice would stabilize after experiencing an exponential explosion of reproduction and finally remain in a certain range.
in the first half of the experiment was expected, but in the later stage of the experiment, the mice no longer reproduced. Although there was enough living space and food, the mice just did not give birth to . When the last rat died, all the mice in this utopian were extinct. Nowadays, the fertility rates in many countries are falling year by year, and we seem to be heading towards the end of the experiment.
Whether it is the sixth mass extinction of biological organisms or the population decrease, humans are always bound to the earth. If there is a large and small activity on the earth, humans will immediately extinction . So at present, if humans want to continue civilization, they can only continuously develop technology and improve the level of civilization.
When you have the ability to freely shuttle between the stars, can dominate your own destiny.
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