Scientists at the University of Naples Federico II have determined that domestic dogs are capable of detecting human fear through scent and responding to it with behavioral changes.
Oxu.Az reports that the results of the experiment conducted by the scientists were published in the journal "Popular Science."
The scientists explain that fear is accompanied by the release of stress hormones adrenaline and cortisol, which alter the chemical composition of breath and sweat.
Dogs can detect these changes thanks to their advanced sense of smell. They have approximately 220 million olfactory receptors, whereas humans have about five million.
Additionally, an organ called the vomeronasal organ, which receives pheromones and other chemical signals, helps the animals.
