Rather than relying on samples that need to be shipped in glass vials and on ice, researchers have developed a new method that allows mouse sperm to be sent easily at room temperature using standard mail delivery.

Obese mice that exercised while pregnant gave birth to pups that grew up free of the metabolic issues present in the adult young of sedentary obese mothers—possibly by staving off epigenetic changes to a key metabolic gene.

A pool of neural stem cells that ordinarily lies dormant in the brains of adult mice spawns two types of never-before-documented glial cells when artificially reactivated, potentially pointing to a novel mechanism of brain plasticity.

Some viruses, possibly even SARS-CoV-2, can sneak into the brain through the nose. Recent studies show that microglia are ready for them when they do.

Two studies show that Plasmodium—the genus of protozoans that cause malaria—have an internal sense of time that synchronizes with their host’s circadian rhythms and allows the parasites to collectively attack blood cells.

Many researchers have stopped breeding mice, reduced the size of colonies, and established contingency plans in case animal care staff get sick.

In mice, a group of nasal epithelial cells called brush cells release pro-inflammatory signals in response to allergens.

Recent work in humans and mice highlights how exposure to environmental microbes helps protect against allergies and other inflammatory diseases.

Researchers find strains of the bacterium Klebsiella pneumoniae that produce high levels of alcohol in 60 percent of patients with the condition.

Curbing the growth of harmful bacteria in mouse microbiomes reduces the animals’ incidence of inflammation-related colorectal cancer.

Neither the maternal microbiome nor housing conditions appear to permanently alter which microbes remain in the animals.

Detailed imaging of the rodent central nervous system reveals new information about the route cerebrospinal fluid takes to leave the brain.

Staff at the UK’s Harwell Institute were notified that a strategy board recommended halting its academic work, but a final decision is months away.

When hair follicle stem cells lose their protein-based death cue, they take on a new role helping to repair wounds in skin.

T cells modified to target disease-contributing B cells improved survival in two mouse models of the autoimmune disease.

Researchers develop an app that can estimate the biological age of a rodent from its mug shot—and could give a boost to the science of human aging in the process.

Genetic mutations create lab mice with unusually long and short tails.

Researchers use a CRISPR-Cas9 strategy to expand a desired trait from 50 percent of mouse pups to about 72 percent.

A mesh records retinal cells’ firings in live animals.