Rodents and Shrews

Mice pups were borne out of freeze-dried mice sperm that had been stored on the International Space Station for up to six years. Some of those mice and their offspring are pictured here.

After a Six-Year Sojourn in Space, Freeze-Dried Mice Sperm Produce Healthy Pups

Scientists say the finding supports the idea that genetic material can be shipped to other worlds to help establish a diversity of life

Genetic tests reveal that the Shark Bay mouse (pictured) from Shark Bay, Western Australia, is actually a living population of Gould's mouse, which had been thought to be extinct for more than a century.

Australian Mouse Presumed Extinct for More Than a Century Found Alive on Island

The living Shark Bay mouse turned out to be genetically identical to the formerly extinct Gould’s mouse

Experiments showed that pigs and mice can absorb oxygen through their rectums.

Anally Delivered Oxygen Kept Suffocating Pigs and Mice Alive in the Lab. Could the Method One Day Save Human Lives, Too?

The technique may provide doctors with a new way of providing supplemental oxygen for patients with failing lungs

A beaver peers out of a Hancock live trap after being captured by Molly Alves, a biologist with the Tulalip Tribe in Washington.

Scientists Are Relocating Nuisance Beavers to Help Salmon

When the rodents are moved from backyards to wild areas, they make their new watersheds better for fish

A new study found rat poison in the bodies of more than 80 percent of 133 dead bald and golden eagles from across the U.S.

Study Finds Rat Poison in Dead Eagles From Across the U.S.

More than 82 percent of 133 eagles tested had so-called anticoagulant rodenticides in their bodies

Researchers were first intrigued by the social structure of the mole rats in the 1970s because, like bees and termites, naked mole rats have a single-breeding queen and have non-breeding worker rats

Naked Mole Rats Speak in Dialects Unique to Their Colonies

The accent is influenced by each group's queen but can vary if the monarch is overthrown

A new study finds beaver-eating wolves alter the landscape in Voyageurs National Park in Minnesota by changing the number and distribution of beaver ponds.

Minnesota Wolves Are Eating Beavers and Reshaping Wetlands

A new study finds that when a wolf kills a beaver its abandoned dam falls apart and goes unoccupied for more than a year

This illustration shows one of the newly described species of stilt mouse, Colomys lumumbai, wading at the edge of a stream.

Two New Species of Semi-Aquatic Mice Identified in East African Rainforests

Mice from the genus Colomys stand on kangaroo-like feet to wade in shallow water and use their whiskers to find prey

A regular mouse is pictured on the left of a bulky "mighty mouse."

Space Mice Return to Earth, Mighty as Ever

Their space voyage provides new insights for treating muscle and bone loss

This cheese is real, but by stimulating certain parts of a mouse's brain, researchers were able to trick the critter into smelling scents that were not present.

Experiment Tricks Mice Into Smelling Things That Aren’t There

Researchers stimulated certain of the mouse’s brain cells in a particular order to produce 'synthetic smells'

The earliest evidence of mice making themselves at home alongside human settlements comes from 14,500-year-old bones found among the Natufians.

The House Mouse First Invaded Europe 6,500 Years Ago

New research suggests the rodents arrived on the continent some 2,500 years earlier than previously thought

Invasive mice kill more than 2 million chicks on Gough Island each year, including the chicks of the critically endangered Tristan albatross, pictured here

COVID-19 Stranded Scientists Trying to Save Endangered Birds From Killer Mice

Conservationists from the Royal Society for the Protection of Birds had to take a wild, long route home to the United Kingdom

The Covid-19 pandemic has skyrocketed the demand for new strains of mice to help scientists understand the progression of the disease, test existing drugs, find new therapeutic targets and develop vaccines.

Building a Mouse Squad Against COVID-19

A Maine laboratory is on the verge of supplying a much-needed animal for SARS-CoV-2 research

Researchers at the Allen Institute for Brain Science averaged the structures of 1,625 mouse brains to create a standard model.

Researchers Created a 3-D Map of 100 Million Cells in the Mouse Brain

Neuroscientists have been using the tool since 2017 to pinpoint where exactly their data are coming from

Naked mole-rats pile on top of each other in large groups to sleep inside their nest. This behavior may help keep carbon dioxide levels high, lowering the animals' risk of seizure.

Naked Mole-Rats Bathe Their Bodies in Carbon Dioxide to Prevent Seizures

Expelled by animals as a waste product, the gas appears to play a crucial role in keeping these bizarre, burrowing rodents safe

Could rats be genetically wired for New York City living?

Rats May Be Genetically Adapted to New York Living

Perhaps it was not just a massive slice that made Pizza Rat a true New Yorker

Two giraffes

Fourteen Fun Facts About Love and Sex in the Animal Kingdom

Out in the wild, flowers and candy just aren’t gonna cut it

This deer mouse certainly looks pretty stressed and scared.

When Stressed Out, Mice’s Fur Turns Gray Quickly

A new study gives scientific backing to an old adage—and suggests that stress might affect the human body in dramatic ways

Invasive Mice Are Gnawing the Scalps of Endangered Albatrosses

The mice already kill an estimated 2 million seabird chicks per year, but they now target breeding adults

Talk about a rat race.

Scientists Taught Rats to Drive Tiny Cars to Earn Froot Loops

What’s more, driving seemed to relax the rodents

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