For man, during the choice of the pair, the visual and the inner values dominate, while in the animal world there is a lot of emphasis on the sense of smell.
Even in the case of human beings, we thought that although they have a much better sense of smell, it does have a minor role in the choice of pairs. They thought the chimpanzees didn't rely on their sense of smell, but a German study was quite different.
The chimpanzees were packed with plastic boxes that were injected with the urine of a stranger, a relative and a familiar companion. There were boxes that were not in anything. Researchers took shots of animal reactions. Which box was in contact with urine, it smelled basically much longer. The alien box was not shot for a long time, immediately raised to their nose. In other words, the sight was only important for the first time, and then the main thing was the smell. The box that was wrapped in the urine of a familiar animal was sniffed the longest.
So far, we didn't think it would be so important for primates to smell, so today we know it's not. They cannot always rely on visuality. Invaders and animals belonging to their teams are not always visible, so it is better to feel them before they see them. Smell also plays a major role in this.
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(Source: homeowner.com <br> pixabay.com)