Your nose is the first indicator that death is approachingS

It is our human nature to believe in death in our minds, and the way we depict death is also associated with seeing dead animals, humans, birds, and flies. What is the connection between them, but we have not thought about it before? Smell.

According to current research, the human nose is capable of detecting a variety of odors that do not fall into any specific category, but respond to them. Like an odor caused by a chemical called putrescine. It’s a chemical produced when the body begins to break down, and here’s a little thing to know: this smell is the result of hidden behaviors in animals over the years of evolution, and these responses are thought to have evolved at least 420 times. million years ago.

It is believed that animals respond to the smell of putrescine as a sense of danger in two different ways: a response that a predator is near, and the second, because their life is in danger, their instincts tell them to flee.

Scientists conducted 4 different experiments on humans with a mixture of putrescine, water, and ammonia to confirm that human reactions and behavior are indistinguishable from animals.


The first experiment tested participants’ vigilance by exposing them to the exact smell of putrescine. The results showed that participants exposed to the smell of humus were significantly more alert than those exposed to ammonia or water.

escape behavior

In a second experiment, the scientists tested a group of subjects who were in no doubt where they were given a task that assessed odors, namely intensity, aversion, and familiarity. The researchers wanted to see how the group responded to the scent and how quickly the participants moved 80 meters away. People who smelled putrescine tended to move away from the area more quickly, suggesting that odor is a powerful escape motivator.

In another experiment, immediately after the group was exposed to the rotten smell, the researchers tasked the participants with completing the stem with words.

The results showed that the smell of putrescine was brought to the sum of a group of word stems, all related to the escape word and other associations. Even smell has grown to the point of using a string word.

Defense and hostility

In the final test, the participants failed to detect the subtle scent. In this experiment, they were presented with a research text and tasked with evaluating its authorship.

They were unable to accurately detect the smell of putrescine, and participants defended the author and showed hostility. It also showed that unconscious exposure to the scent induced defensive behavior in the participants.

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