This statement is ridiculous. You can live 10 minutes without hypoxia.
Since there is no oxygen, people can't live for a few minutes, but after living for 70 or 80 years, it's because oxygen kills them. Isn't this typical ingratitude? What logic? Does this kind of person think that it is logical for food to enter from the ass and pull out from the mouth?
Oxygen is essential for most living things on earth. But there are exceptions There are some anaerobic creatures on the earth, that is, creatures that hate oxygen very much, but these creatures have not evolved into big creatures, or even creatures as big as ants, and they are basically in fungi.
Anaerobic organisms include obligate anaerobic organisms, facultative anaerobic organisms and anaerobic resistant anaerobic organisms. Obligate anaerobic organisms are very sensitive to oxygen and cannot survive in aerobic environment. Oxygen is an acute poison for them, such as Botox and tetanus. Facultative anaerobic organisms can survive in aerobic environment. In the absence of oxygen, some will ferment, while others can breathe without oxygen, such as Staphylococcus, Corynebacterium and Listeria. Anaerobic organisms can survive in an aerobic environment, but they do not depend on oxygen. These bacteria are all fermenting fungi, such as yeast.
Probably for these anaerobic creatures, oxygen is poison. The existence of anaerobic organisms shows that life does not necessarily depend on the existence of oxygen, but it cannot be inferred that oxygen is poison. It is really absurd to blame oxygen when people die after 70 or 80 years.
Life on earth is from anaerobic to aerobic.
Billions of years ago, the most primitive life on the earth did not need oxygen, because there was no oxygen for a long time after the birth of the earth, and oxygen was originally the garbage made by life.
Scientists have found evidence of life more than 3 billion years ago. These evidences include microbial fossils found in Australia 3.4 billion years ago and microbial metabolic fossils found in Canada 3.77 billion years ago, indicating that life had developed into a relatively complex form at that time. At that time, there was no or extreme lack of oxygen on the earth. At that time, vast expanse, the earth, had nothing green but flying sand and stones and boiling water.
How life came into being is still inconclusive. According to the theory of natural evolution, small molecular inorganic substances in seawater gradually evolved into large molecular organic substances under the bombardment of lightning and thunder volcano, and finally the first living cell was born; In a whisper, organic matter or the original primitive single cell was brought by meteorites or comets and evolved into complex life on earth for a long time.
Although the origin of life is still inconclusive, the earliest life should have appeared 4 billion years ago, without oxygen, which seems to have become a scientific knowledge.
Why is oxygen the garbage produced by living things?
As mentioned earlier, the earth was originally anaerobic, and primitive life was anaerobic until 2.4 billion years ago. Under the irradiation of ultraviolet rays from the sun, seawater produces a small amount of oxygen through photolysis, which gradually accumulates. After hundreds of millions of years of evolution, some microorganisms with unique photosynthetic pigment functions have emerged. Carbon dioxide in the atmosphere is gradually decomposed into oxygen and organic matter, and then seaweed plants multiply in the ocean.
The spread and growth of algae plants began to produce a lot of oxygen, followed by bryophytes and terrestrial plants, which also joined the ranks of oxygen production. Some studies believe that 88% of the earth's initial oxygen comes from the ocean, in which algae play a huge role. After oxygen is sufficient, life gradually evolves from heterotrophic to autotrophic, from simple to complex.
Some studies believe that the earth's oxygen was not rich enough until 600 million years ago, so this is in line with the Cambrian explosion of life 540 million years ago. Life was never visible, from simple to complex, forming a diversified explosion trend and forming mutual confirmation. However, some people think that oxygen was abundant when life began to evolve and differentiate more than a billion years ago. However, since life had not evolved into bones at that time, it was impossible to leave fossils. It was not until the Cambrian that more advanced creatures such as vertebrates appeared, so the illusion of life suddenly appeared from the discovery of fossils.
It's a little off topic. All this is just to show that life does not necessarily need oxygen, and the ancestor of the earth is anaerobic life. But now some aerobic organisms such as human beings cannot do without oxygen, which is a dependence gradually formed after billions of years of evolution. Only through aerobic breathing can human beings meet the demand of cells for oxygen, produce normal metabolism, oxidize and decompose nutrients in the body, produce energy to maintain life activities, and discharge metabolic wastes such as carbon dioxide. Otherwise, you will die.
Titan
Is it possible that there is life without oxygen outside the earth?
I don't know yet. Humans have been searching for extraterrestrial life and civilization for hundreds of years, and so far they haven't even found a single bacterium. However, the scientific community generally believes that extraterrestrial life or extraterrestrial civilization should exist, but the universe is too big, and the probability of the formation of life and civilization is too small, so it is even harder to find it.
Space-time communication believes that extraterrestrial life or civilization is by no means what some people think. It must be like life on earth, and it must need water, oxygen and suitable temperature. There is life on the earth that can survive without oxygen. I believe that extraterrestrial life exists more without oxygen, because there are too few aerobic planets. There are more than 200 planets in the solar system, no planet is rich in oxygen except the earth.
For example, on Titan, there may be life. If there is life, life there must not need oxygen and is not afraid of oxygen.
Titan is the only satellite with a dense atmosphere in the solar system and the only planet with liquid lakes and oceans on the outer surface of the earth. Titan is Saturn's largest satellite and the second largest satellite in the solar system, also known as Titan. Titan's diameter is about 5 150km, and its mass is 1.345 * 10 23kg, which is 2.25% of that of the earth and 1.83 times that of the moon.
What kind of life might Titan have?
Scientists believe that there is a great possibility of life on Titan, but even if there is life there, it is a special life without water and oxygen. Because the atmosphere on Titan is mainly nitrogen, accounting for 98.44% of the total atmosphere, the rest is mainly hydrocarbon residues, including methane, ethane, diacetylene, propyne, propionitrile, acetylene, propane, carbon dioxide, cyanide, hydrogen cyanide, helium and so on. That is, there is no oxygen.
The surface temperature of Titan is-179. 15℃, so there can be no liquid water. The liquid lakes and oceans on Titan are made of hydroxyl chemicals such as methane and ethane, which is simply liquefied natural gas. There is extreme lack of oxygen, so if life is really found there, it is a creature that does not need oxygen at all, is extremely resistant to low temperature, and relies on methane for food, which will completely subvert human cognition of life.
Many people always stubbornly believe that only an environment like the earth can give birth to life, so they always tell everyone mysteriously, don't talk, don't expose the coordinates of our earth, or aliens will plunder the resources of the earth. This idea is ridiculous and naive, because even for the life of Titan, everything on the earth may give them a fatal blow, such as temperature, oxygen, liquid water and so on.
Since life in the solar system may be diverse, what about the universe? So the earth's environment, including temperature, oxygen and water, is probably the poison of alien life. Again, even so, oxygen is by no means a poison to human beings.
That's it. Welcome to participate in the discussion. Thanks for reading.
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