When I read about a study done on rats that hasn’t been translated into humans, I proceed with caution. But this one makes sense for the sake of survival. A study found that mice can influence a change in smell when one of their fellow pack animals is sick.
Albeit humans and mice vary in many ways, being able to smell sickness is a unique advantage. We can see if someone is pale and looking ill. We can hear if someone is vomiting (it’s a most unpleasant sound). We can smell rancid food and our senses are screaming don’t eat that! It makes sense that sickness smells. Perhaps our bodies adapt to it to blend.
The function of nose hair is an interesting one. Obviously this fact doesn’t apply to rats because they don’t live long enough for the full effect of it. Anyhow – as we age our immune system becomes weaker. This is usually the time nose hairs start to get longer. It’s supposed to be the first line of defense in the immune system.
Fun fact about the brain and stored memories is that where we archive time and space memories we also store that of smells. This is most certainly a mechanism of adaptation and survival. If we can blend and avoid further exposure – we have a fighting chance of survival.
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