Some mice may owe their monogamy to a newly evolved type of cell

What makes the oldfield mouse steadfastly monogamous throughout its life while its closest rodent relatives are promiscuous? The answer may be a previously unknown hormone-generating cell. Scientists discover the cells and hormones that inspire mice to nurture their young; the same hormones are also present in humans.

from Top Health News -- ScienceDaily https://ift.tt/M7FGqyO