The deer mouse (Peromyscus maniculatus), sometimes called the field mouse, is a little bigger than a house mouse. It's easily ...

Mice of the genus Peromyscus range from monogamous partners and devoted parents to promiscuous and uninvolved ones. Some build intricate burrows, while others keep them simple. When faced with threats ...

These sperm hooks are found not only in animals in the Peromyscus genus, which Hook studies, but across almost all mice—which is why it’s so surprising that scientists don’t know what they’re for.