U.S. research says human nose can distinguish 1 trillion odors
A new study published in the US “Science†magazine shows that human noses can detect 1 trillion different odors, far exceeding what we previously considered 10,000.
Researchers at Rockefeller University in New York City, in order to understand how many different odors human noses can smell, they used 128 odor molecules to create new odors, and then let 26 subjects sniff 3 vials each time, among them The two vials smelled exactly the same and the subject needed to smell the bottle with a different smell. The study found that as long as the odor component overlap is less than 50%, the subject can generally be successfully distinguished. Based on this result, the researchers calculated that humans can theoretically smell at least 1 trillion odors.
According to co-author Dr. Leslie Vosshall, people have always believed that animals have a much better sense of smell than humans. In fact, human olfactory abilities are much stronger than expected and cannot be underestimated. The smell of animals on the surface is better than humans because they invest more brains. And humans only use a small part of their sense of smell.
Stephen Liberles, a professor at Harvard Medical School, said: "The nose has a lot of olfactory receptors, which means that the human sense of smell may be stronger than estimated by this study. This study still has a long way to go."
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