Skip to main content

Subscribe to Smithsonian magazine and get a FREE tote.

Mammals

None

See the 2,500-Pound Bronze Bison as They Arrive at Their New, Permanent Place at the Smithsonian’s National Museum of Natural History

More than a century ago, the massive mammals actually grazed beside the Smithsonian Castle. As of today, two large sculptures continue that legacy as they flank the museum’s main entrance

Some researchers think that two varieties of orcas are so different that they should be considered separate species. 

Do These Severed Orca Fins Covered in Tooth Marks Mean Killer Whales Are Cannibals? It’s Complicated, Scientists Say

Researchers suggest that predation by a subspecies called Bigg’s orcas might explain why members of another one, called resident orcas, stay in such large family groups

The pygmy long-fingered possum uses its specialized ears and long digits to hunt for grubs in rotting wood.

Scientists Thought These Marsupials Went Extinct 6,000 Years Ago. They Just Found the Animals Alive

The pygmy long-fingered possum and the ring-tailed glider are rare examples of “Lazarus species”

Jaguars in Porto Jofre, Brazil, support a lucrative tourism industry, leading conservationists to argue that the big cats are most valuable when they’re alive.

In the World’s Best Place to See Wild Jaguars, Residents Are Using the Big Cat’s Appeal to Reach Conservation Goals

Brazil’s Pantanal region has the highest jaguar density on Earth, drawing camera-toting visitors to its riverbanks. Despite overtourism concerns, one enclave may offer a model for how to protect the charismatic apex predator

Scientists at the Woods Hole Oceanographic Institution quickly identified the recording as belong to a humpback whale. 

Listen to What Archivists Believe to Be Oldest-Known Whale Recording

The nearly 80-year-old disc resided in the archives of the the Woods Hole Oceanographic Institution for decades and may hold the secret to learning about changes in whale behavior over time

Based on Andrewsarchus’ skull size and the skull-to-body-size ratios of other hoofed predators called mesonychids, scientists estimated in 1924 that the beast was more than 12 feet long and about 6 feet tall. Reassessments of Andrewsarchus’ evolutionary tree, however, suggest this estimate is inaccurate.

This Giant Carnivore Ran on Hooves. Scientists Are Investigating Its Massive Skull and Crushing Teeth to Decipher the Beast’s True Nature

For more than a century, paleontologists have been piecing together how the mysterious predator Andrewsarchus is related to other mammals, like the extinct “hell pigs” and “wolves with hooves”

An elephant has about 1,000 whiskers on its trunk.

An Elephant’s Trunk Is Covered in Whiskers—and They’re Unlike Those on Any Other Animal, a New Study Suggests

Hundreds of the specialized hairs help the poor-sighted creatures navigate the world

Once treated by humans as prey, horses became key to transportation, warfare, trade and companionship. Their history is intertwined with our own.

Gallop Into the Year of the Horse With These Five Amazing Equine Discoveries

Since their domestication, horses have changed the course of human history. It’s no wonder the Chinese zodiac associates them with prosperity and success

Scientists found that fringe-lipped bats have a roughly 50 percent success rate when trying to capture prey.

These Lazy Bats Are Super-Efficient Killers That Carefully Conserve Energy to Attack at a Moment’s Notice

Wild fringe-lipped bats spend just one-tenth of the night in flight, but they can precisely snatch a calling frog and nab prey that rivals their own size

Stoats, also often known as ermines, are carnivorous mammals in the weasel family. Two stoats are the mascots of the 2026 Winter Olympics in Italy.

What Is a Stoat? Learn Five Fun Facts About the Adorable Weasels Chosen as the Olympic Mascots

Milo and Tina, a pair of sibling stoats, are representing this year’s winter games in Italy

A juvenile harbor seal lies on a beach in the Netherlands.

Seals Are Seemingly Vanishing Off the Dutch Coast. These Scientists Are Trying to Get to the Bottom of the Mysterious Disappearances

Recent counts of the Wadden Sea’s adult harbor seal population have revealed a surprising trend of decline, prompting a consortium of researchers to investigate whether the animals are dying off, relocating or experiencing something else altogether

The female calf was born on February 2 at 1:15 A.M. Eastern Standard Time.

An Asian Elephant Was Born at the Smithsonian’s National Zoo for the First Time in Almost 25 Years. Now, You Can Help Pick Her Name

The calf was born to 12-year-old Nhi Linh, a first-time mother, and 44-year-old Spike. The pair bred as part of a program working to conserve the endangered species

Shovel-tusked elephants like Amebelodon were discovered nearly a century ago, and paleontologists have learned more about their anatomy and behavior with time. This 1932 illustration was later found to be inaccurate, as Amebelodon actually had a longer and narrower trunk.

Strange, Shovel-Tusked Elephants Puzzled Paleontologists, Until Experts Took a Closer Look at Their Teeth

The animals’ extended lower jaws were seemingly made for scooping, but research over the past few decades has found they could do a lot more than initially expected

Common big-eared bats eat relatively large insects, such as katydids.

A Robot Is Unraveling the Secrets of How Some Bats Bounce Sound Waves Off Leaves to Find Insect Prey

A new study from the Smithsonian Tropical Research Institute used a robot to mimic common big-eared bats’ echolocation skills

Naked mole-rats are unusual for their long lives and resistance to cancer. Now, researchers suggest the rodents not only tolerate but prefer to be in low-oxygen air.

Naked Mole-Rats Prefer Low-Oxygen Air That Would Kill Most Mammals, Adding to Their List of Death-Defying Superpowers

These underground rodents are the first mammals found to actively choose air with lower-than-normal oxygen levels. Their remarkable ability to survive these conditions could offer a key model for researchers studying new treatments for stroke or lung diseases in humans

Research suggests that elephants use certain plants for medicinal purposes.

When Some Elephants Raid Farms, They Might Not Be After a Snack. They Could Be Looking for Medicinal Plants

A recent study suggests that the large mammals may seek out parts of bananas and papayas when they’re suffering from gut parasites, sparking a cross-species exchange of pharmaceutical knowledge

Male white-tailed deer rub their heads on trees and urinate on scraped-up earth to leave "signposts," which glow under ultraviolet light, a study suggests.

When Male Deer Mark Trees, Those Spots May Glow Like Neon Lights at Dusk and Dawn, Though Humans Usually Can’t See Them

During the breeding season, white-tailed deer might use their eyes and noses to navigate signs—forehead secretions on trees and urine on the ground—left by males of their species, a study suggests

Researchers were surprised when they spotted an additional cub with this mother polar bear.

This Mama Polar Bear Adopted a Young Cub—and You Can Track the Family as They Wander Around the Hudson Bay

The rare event marks the 13th known instance of adoption within this well-studied group of polar bears living in the western Hudson Bay area

In 2025, researchers watched an interstellar comet, learned about human origins and traced the spread of measles.

The Ten Most Significant Science Stories of 2025, From Medical Breakthroughs to an Interstellar Visitor

All year long, these moments captivated the public, demonstrated dangerous trends, and pushed research and innovation forward

The growth plates, known as specimens UAMN3760 and UAMN3724, were discovered near Fairbanks in the early 1950s.

Mysteriously Young ‘Mammoth’ Fossils Discovered in Alaska Turned Out to Be Whale Bones

When researchers learned the fossils were merely 1,900 to 2,700 years old—which would be the youngest woolly mammoth fossils ever found—they suspected something was amiss

Page 3 of 42