Mice 'eavesdrop' on rats' tear signal

Tears might not seem to have an odor. But studies have shown that proteins in tears do act as pheromonal cues. For example, the tear glands of male mice produce a protein that makes females more receptive to sex. Now researchers ...

Sexually naive male mice, fathers respond differently to pups

Sexually naïve male mice respond differently to the chemical signals emitted by newborn pups than males that have mated and lived with pregnant females, according to a study published March 20 in The Journal of Neuroscience. ...