The wonderful world of tennis is helping nature’s tiniest mammals survive. Each year, following Wimbledon, thousands of used tennis balls are donated to UK Wildlife Trust. Volunteers at the ...

Two new species of delicate mice — Australia’s smallest rodents — were recently discovered, according to a new study. Photo from Joey Csunyo, UnSplash Two species of tiny rodents have lived undetected ...

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 ...

A new study suggests that the Agouti gene in the brains of male African striped mice can act as a molecular "switch," making ...

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 ...