Evidence of pheromones in eye secretions surprises researchers.
It may not be considered manly for humans to cry. But when male mice shed a tear, they seem to be trying to prove their masculinity. So say Japanese researchers who have discovered that male mice release pheromones in the fluid that moistens their eyes.
It may not be considered manly for humans to cry. But when male mice shed a tear, they seem to be trying to prove their masculinity. So say Japanese researchers who have discovered that male mice release pheromones in the fluid that moistens their eyes.
