How Can Animals Detect How Humans Are Feeling?

The video discusses a study showing dogs can distinguish between stressed and calm humans through smell, with a 94% success rate. Dogs have a superior sense of smell due to more olfactory receptors and brain regions dedicated to processing smells. They can detect diseases like cancer and COVID-19. Other animals, such as rats and pigeons, also show potential in disease detection. This ability could lead to earlier detection of illnesses.

What new insight or understanding did you gain from this video?