Ronin the African giant pouched rat is one of more than 100 rats trained by a Belgian nonprofit to sniff out deadly land mines.

Super-Sniffing Rat Sets a New World Record for Discovering Deadly Land Mines—and He’s Just Getting Started

Ronin, a 5-year-old African giant pouched rat, has found 109 land mines and 15 other unexploded ordnances in Cambodia

The mice were genetically engineered to have mammoth-like traits, such as thick, fluffy hair.

Biotech Company Creates ‘Woolly Mouse’ as a Step in Its Quest to Resurrect Woolly Mammoths Through Gene Editing

Colossal Biosciences leaders say the fluffy, golden-haired mice help validate their technique to “de-extinct” species, but outside scientists remain skeptical

Cells producing the NOVA1 protein are shown in green in the brain of a mouse. A specific variant of this protein is unique to humans, and researchers suggest it is linked to spoken language development.

Scientists Identify a Gene Linked to Spoken Language, and It Makes Lab Mice Squeak Differently

A new study suggests the unique human version of the NOVA1 protein developed after our ancestors split from Neanderthals on the evolutionary tree, and it might have given us a competitive edge over our relatives

Nutria have voracious appetites for vegetation, leading them to destroy wetland ecosystems.

The U.S. Fish and Wildlife Service Wants You to Eat These Giant, Invasive Rodents

As part of National Invasive Species Week, the agency is calling on Americans to “eat the invaders,” including swamp-dwelling nutria

A new study suggests lab mice will open the mouths and pull on the tongues of their unconscious companions.

Lab Mice Appear to Offer ‘First Aid’ Care to Their Unconscious Companions, Even Pulling on Their Tongues

A new study finds that mice will sniff, lick and pull the tongue of other mice that are under anesthesia, serving to open their airways

Mice have an instinctive reaction to hide when the shadow of a bird passes over. In a new study, scientists taught the rodents to overcome that fear.

How Can the Brain Overcome Fear? New Study of Mice Offers Clues to PTSD and Anxiety Treatment

Researchers identified two brain areas in mice that helped the animals learn to suppress their instinctive fears of predators

One of the first-ever images of the Mount Lyell shrew in California

See the First-Ever Photographs of the Elusive Mount Lyell Shrew, Finally Caught on Camera in California

A group of young researchers captured and photographed the animal on a three-day expedition to the Eastern Sierra Nevada

A California ground squirrel carries a vole in its mouth after hunting the rodent.

Squirrels Are Displaying ‘Widespread Carnivorous Behavior’ for the First Time in a California Park, New Study Finds

The familiar rodents, known for eating nuts and seeds, have been spotted hunting and decapitating voles in a gruesome dietary adaptation. Scientists say it might signal resiliency in face of future environmental pressures

Pocket gophers are a type of burrowing rodent known for their extensive tunnels.

New Research

How a Team of Gophers Restored Mount St. Helens After Its Catastrophic Eruption With Less Than a Day of Digging

After the volcanic eruption of 1980, scientists released the burrowing rodents for only a brief time, but their activities left a remarkably enduring impact, according to a new study

The rats let their handlers know when they've found something by tugging on a ball attached to the front of their custom vests.

These Giant, Vest-Wearing Sniffer Rats Could Help Combat the Illegal Wildlife Trade, Scientists Say

Researchers trained African giant pouched rats to detect commonly smuggled items, including rhino horns and elephant tusks

Cinnamon, the escaped capybara, was born at Hoo Zoo, along with her twin brother, Churro. They live there with their parents, Chimu and Chincha.

A Runaway Capybara Is Evading Capture and ‘Living Her Best Life’ in England

The “beloved” rodent named Cinnamon was spotted this week with help from drones. She has been wandering and eating grass after escaping her zoo enclosure last Friday

A picture of Calhoun in a mouse utopia in 1970

Cool Finds

This Old Experiment With Mice Led to Bleak Predictions for Humanity’s Future

From the 1950s to the 1970s, researcher John Calhoun gave rodents unlimited food and studied their behavior in overcrowded conditions

An artist's impression of the shrew-like Krusatodon kirtlingtonensis, which a new study suggests lived long and matured slowly, in contrast to modern small mammals.

Two Rare Jurassic Skulls Could Help Unlock the Secrets of Mammals’ Evolutionary Success

Fossils reveal a prehistoric, mouse-like creature matured slower and lived longer than similar mammals of today

Wedge-tailed shearwaters surprised scientists by showing up after rats were eradicated on Tromelin Island—a place, in the Indian Ocean, where the seabirds hadn’t been documented breeding before.

After Rats Were Eradicated From This Small Island, Seabirds Thrived

Tromelin Island became a safe place for birds once the invasive mammals were eliminated

Toxins from the Colorado River toad have been ingested by some for their psychedelic and medicinal effects.

A Modified Psychedelic Toad Toxin Reduces Signs of Depression and Anxiety in Mice, Study Suggests

Colorado River toads produce a psychoactive toxin that some have claimed has medical benefits. The new research suggests these benefits could be achieved without hallucinations

Previous research had found leprosy in modern red squirrels, and genetic analysis suggested the strain was closely related to leprosy found in medieval humans.

Medieval Squirrels and Humans May Have Spread Leprosy Back and Forth

Archaeologists uncovered evidence of leprosy in a medieval red squirrel in England, and DNA evidence revealed the strain was similar to what was circulating in humans at the time

Cats can be infected with plague by flea bites or by eating infected rodents.

Oregon Resident Catches Rare Case of Plague, Likely From Their Cat

The patient was treated during the earlier stages of disease, so the community faces little risk, according to health officials

Captured mid-hop, the floppy feet of a white hare were indeed good luck for this photographer.

Smithsonian Photo Contest Galleries

Celebrate Winter in the Wild With 15 Photos of Animals Enjoying the Snow

These chilly but cute creatures will remind you what’s so wonderful about winter

Human tears may contain an odorless chemical substance that reduces aggression, a new study finds.

Sniffing Women’s Tears May Reduce Aggression in Men, Study Finds

The findings, which may extend to all humans, suggest emotional tears might serve an evolutionary purpose

After peanut butter failed to attract the giant rats, researchers turned to sesame oil.

See the First-Ever Photographs of a Rare Giant Rat That Lives Only on One Pacific Island

The elusive and critically endangered Vangunu giant rats are at least twice the size of common rats

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