The elephant's nose may be the most demanding mammalian sniffer on the planet. According to a new study published on Tuesday, the nose of African elephants is the most sensitive compared to humans, mice and dogs. But this does not mean that elephants should replace dogs into the police. Although elephants have twice as many active olfactory genes as dogs, the key is how organisms use these genes. For example, dogs have a well-known sense of smell, but scientists actually know that their number of olfactory genes is smaller than mice, but mice do not show similar abilities.
The olfactory advantage of elephants is likely to be the ability to recognize a wide range of odors. Previous studies have shown that Asian elephants can distinguish very similar odorant molecules that humans and other primates cannot. Elephants can recognize the odors of other elephants' urine. Studies have shown that elephants also use pheromones to communicate and induce unconscious reactions.
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