Compared with other animals, the eye that cannot see ultraviolet rays proves that humans are the chosen ones
I believe that many people know that ultraviolet rays in the light will cause certain damage to the skin, such as darkening the skin, but in fact, ultraviolet rays have not really been seen, but animals can see. And there are many animals that can see ultraviolet rays, including those flying in the sky and swimming in the water, and for this reason, humans see various colors, but animals may see different colors.
For example, sharks, although large, are highly colorblind and can only see black and white. It can see ultraviolet light, so it is more sensitive than human events in this regard. Although the shark does not see many colors, but living in the ocean, it can better track the prey in the deep sea by virtue of the black and white colors it can see. It can be said that every animal can see ultraviolet rays, which has many benefits for their lives.
For example, because of its own color, many people can't see this animal when the snow is covered, but the reindeer see the polar bear later, because it is seen from the ultraviolet rays reflected from the polar bear's hair, which also enables them to better avoid predators.
It is reasonable to say that the more things you can see is naturally beneficial, but as a human being, although you can't see ultraviolet rays, you can have more abilities, which are actually related to these factors. For example, the evolution of earth's biological resistance to ultraviolet rays.
By understanding human evolution, we can know that when the first life was born on Earth, there was no oxygen in the first place. It was not until the passage of time that cyanobacteria, which produced oxygen, were not available until the passage of time, and the oxygen in the atmosphere continued to increase. Atmospheric oxygen levels to modern concentrations should go back 400 million years. It is also because of the continuous increase of oxygen that more and more life on the earth, whether it is plants or animals, have come to the earth to live.
At the beginning of life, because ultraviolet rays are through the earth, so there is a great threat to all living things, fortunately, the increase in oxygen blocks the defense line of ultraviolet rays, that is, the ozone content in the atmosphere, which can be said to have a very important role in human life.
It is able to make long-wave radiation without any harmful substances in sunlight, which is effectively absorbed by short-wave light. Therefore, although sunlight can shine on human beings, it will not cause too obvious damage, and only after penetrating the surface of the skin will it have a great impact.
Many people may not know that the damage of ultraviolet rays is particularly large, and even can destroy the DNA and RNA of genetic material. For example, if skin injuries cause a mutated reaction, the most serious one is to cause skin cancer. The shorter the wavelength of ultraviolet rays, the higher the damage to the human body, if it is exposed to this ultraviolet radiation for a long time, it will cause problems in biological reproduction, and even eventually lead to extinction.
But ultraviolet light is also the biggest enemy, it is the ozone layer, which is undoubtedly a good news for the earth, but also because of the effective defense mechanism of biological evolution on the earth, so that many organisms can repair the damage caused by ultraviolet rays, and also make humans a kind of creature that deals with ultraviolet rays.
There are many creatures on the earth, if the creatures want to see the natural line, they will naturally suffer some damage, such as when looking at ultraviolet rays, ultraviolet rays will directly reach the retina, for retinal cells, the eyes will cause great damage. This is also the main reason why animals that can see ultraviolet rays do not have a long lifespan, such as birds and insects.
But there are still some animals that, although they can see ultraviolet rays, also have a long lifespan, such as parrots. Is the answer to this question, there is no scientific explanation, only know that human eyes can not see the ultraviolet rays that animals can see, which has a lot to do with the lens of the human eye, although it accepts ultraviolet rays but has no way to touch, the bottom of the eye has a lot to do, if humans can really see ultraviolet rays, the world will certainly change a lot in everyone's eyes.
Through the work of a painter in his later years, "Water Lilies", it can be known that the color of the world will be like this after the ultraviolet rays, and the name of this painter is Monet. The reason why his paintings are different is actually because after he got cataracts in old age and had two surgeries, but his eyesight is still not particularly good, the reason why he has such a work is because he can see ultraviolet rays, so the work "Water Lilies" can be seen, when humans can really see ultraviolet rays, see what the world is like.
It can be said that in its eyes the world has become blue-purple, but for normal people, the lens of the eye is very important, can defend against ultraviolet rays, to avoid itself in the absorption of ultraviolet rays when being oxidized, but also to protect the lens, so that everyone can see things, to maintain a fresh and transparent look. In life, in fact, cataracts are also a relatively common problem, but this disease, generally because of the fight against ultraviolet lens, antioxidant substances are consumed, so the lens will become cloudy, although with other animals, humans can not see ultraviolet rays, but can make the use of the eyes longer, make the human life longer, indeed can make everyone feel human, worthy of the highest level of animals. In the world, in addition to possessing high emotional intelligence and abilities, human beings are also chosen children.
