Australia can lay claim to two new species of native rodent thanks to a new study. The aptly named delicate mouse was previously thought to be a single species spanning a massive stretch of the ...

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 ...

Forty years ago, a postdoctoral researcher named James McGrath who would go on to spend more than three decades as a clinical geneticist and research scientist at Yale, made a discovery that advanced ...

In the animal kingdom, there are far more mammals that are polyamorous than are monogamous. In fact, just three to five percent of mammals are monogamous, and researchers have long wondered what ...

Both parents of oldfield mice care for offspring, whereas in deer mice, mothers usually care for pups. The discovery of a type of adrenal-gland cell that is present in oldfield mice but not in deer ...

To create mouse-rat "chimeras," researchers injected rat stem cells into mouse embryos that lacked some genes for brain development. Creative Touch Imaging Ltd. / NurPhoto via Getty Images Scientists ...

The adrenal glands of a Deer mouse (left) and Oldfield mouse (right), showing the relative size of the zona fasciculata (green) and the novel zona inaudita (red). NEW YORK, NY — What makes the ...