Your scent changes when you're stressed, but only dogs can tell
It has long been widely believed that dogs can detect emotions by smell. Now scientists in the UK have proven that it is actually the dog's nose that knows.
Acute stress changes the compounds found in human sweat and breath, research has shown. For the new experiment, four dogs were presented with sweat and breath samples collected from human volunteers – before and after the humans were given a difficult math exercise.
The dogs were able to detect with greater accuracy which samples came from before and which from after.
"This study provides further evidence of the remarkable abilities of 'man's best friend,'" said study author, animal psychologist Clara Wilson.