To explain this problem, please first understand an experiment - the mouse's emotional experiment.
Rats are the most undesirable animals in human society, and no one likes rats that pop out of the sewers, but some rats actually bury their own corpses. There are only low-grade life, such as praying mantises, which have the custom of eating the same kind, and eagles and other animals will not eat the same kind when food is plentiful.
Scientists are also beginning to wonder whether animals have emotions or not. To test, they brought in mice with higher IQs in the animal kingdom. Place two rats in a confined space, one of which is locked in a trap, and the other mouse can unlock the trap through its own actions to release the mouse.
This experiment is to be done several times in order to avoid accidental events, until humans find that the mouse will give up inertia or any change in thinking because of different circumstances, different observational effects, but the result is thought-provoking, the mouse does change, but not to escape and give up, but through wisdom to shorten the rescue time of the companion again and again, yes, it not only abandons the companion, on the contrary, it solves the mystery of the mechanism.
This experiment subverted the human view of mice, which not only have emotions, but also selflessly help their own kind.
In order to further verify the existence of this "feeling", the scientists made the experimental conditions more demanding, this time they locked a mouse in a plastic tube, put another mechanism next to it, and put some chocolate in it as a temptation. What choice will the rat make in the face of selfless salvation and selfish gluttony?
Apparently, it chose to save its companions.
At this time, the final experiment, that is, screening, the scientists found a rat that was raised in captivity, this mouse had never seen any other mouse in its life, and it would not have any animals on the earth that were the same as its own race.
When it was put in, it was indifferent to another trapped rat!
It has no desire to save its companions at all, which proves that the mouse saves its companions out of its mood to help its companions, not instinctively, not playfully, but as an emotion that arises when socializing with other mice.
In order to further prove this result, scientists put it into a large cage with many rats, long-term feeling of "society", after the end of a period of group life, scientists continued to do this experiment, the results are shocking, it opened the shackles that trapped companions, which fully verified that animals do have feelings.
This is the fundamental reason why loners are more powerful than social people, social animals are because they are weak and will survive in groups, which coincides with human society, powerful people are generally lonely, but this loneliness is not a disease, but a choice. Strong will inevitably require an isolated living environment, if a person never has their own alone thinking time, it is difficult to be different from ordinary people, this is the infectiousness of social interaction.
Why explain that humans are afraid of the corpses of the same kind, and use the rat rescue experiment on it to pave the way? Because rats will not only save their companions, but also bury the bodies of their own kind.
Non-human mammals have emotions such as fear, nervousness, etc., and in some species, these emotions can be triggered at an approximate level by the carcasses of the same kind, the smell of blood, the smell of predators, etc. In severe cases, non-human mammals can be frightened into fainting, having an episode of cardiovascular disease, or developing post-traumatic stress disorder.
For example, when humans see the death of the same kind, the brain will naturally think that there may be something nearby that can kill people, it may be a murderer, it may be a beast, it may be some poisonous plant or gas, in short, to make you afraid and let you run quickly, this is the life-saving truth that the brain has evolved over millions of years.
The misconception that non-human animals are not afraid of the corpses of their own kind is a small part of the huge misconception that only man understands the concept of death.
The more intelligent animals understand the concept of death, and like the human pain nerve, the fear of death can help highly intelligent animals and intelligent humans quickly understand the deadly threats that exist in the environment.
Human civilization understood from the earliest stages that corpses spread a variety of diseases, and the ability to identify and avoid corpses is good for health. For social animals, being able to understand the death of a group member means being able to quickly know that there are fewer competitors within the group, that fertility resources are lost, or that social bonds are broken.
For scavengers, being good at identifying dead animals has obvious survival value. For animals that raise larvae, being able to understand the death of larvae can save a lot of effort. Organisms with a more developed nervous system generally have a certain degree of death.
For human "cubs", it takes about 10 years to establish the concept of death at the adult level, and many non-human animals and people with poor mental development have a lower understanding of death, but not without it.
In addition, there are two concepts of death that are useful for understanding animals in biological evolution:
First, non-functional: death means that the body is obviously dysfunctional. It does not mean that the function disappears immediately, for example, a deadly venomous snake can still launch a deadly attack with simple muscle twitching. Over time, the body will gradually disintegrate.
Irreversibility: Dead animals are not resurrected on the spot in their complete form. This does not mean that no other creature can run out of the corpse.
To assess the dead or alive of non-human animals, it is sufficient to use the concepts of non-functional and irreversibility.
The wiser the creature, the more able to understand the concept of death, and the real death of human beings is brain death, as long as a human brain is not dead, it will not be buried, just like a vegetative person, the brain needs oxygen, as long as the brain does not die, breathing will continue, this person even if he can not move for a lifetime, but will not be regarded as death.
But no one is afraid of vegetative people.