Mammals

Paleontologists say the collection of uncovered bones likely represents the most complete mammoth ever found in North Dakota.

Miners Discover Seven-Foot Mammoth Tusk in North Dakota

After coal mine workers found the 50-pound specimen, paleontologists studied the site and uncovered more than 20 additional bones

I thought I saw more red foliage this fall. Is that related to climate change?

Does Climate Change Affect Leaves' Fall Colors? And More Questions From Our Readers

You’ve got questions. We’ve got experts

A turtle appears to smile as a dragonfly alights on its nose.

See 25 Breathtaking Images From the Wildlife Photographer of the Year Contest

Representing some of the world's best nature photography, the pictures are being put to a popular vote for the People's Choice Award

While they chew their cud, reindeer brains shift into a state of non-REM sleep.

Reindeer Sleep and Eat Simultaneously, Saving Precious Time in the Short Arctic Summer

While the animals chew their cud, they also enter a state of rest

A group of gray wolves in Canada. Before a wolf pack recently migrated to Colorado, gray wolves were last known to live in the state in the 1940s.

Colorado Will Reintroduce Endangered Gray Wolves This Month

In 2020, voters narrowly passed a measure in favor of wolf reintroduction, and now, wildlife officials are about to begin the controversial effort

A De Winton's golden mole. A member of the species hadn't been definitely seen since 1936.

Scientists Uncover a Golden Mole Species Thought to Be 'Possibly Extinct'

A scent-detecting dog led the team to the discovery in South Africa, and traces of mole DNA helped confirm it

German researchers tested dolphins' ability to detect electric fields.

Bottlenose Dolphins May Have an Electric Sense, Study Finds

Dimples called vibrissal pits on the beaks of the mammals can perceive electricity and might help with hunting and navigation

Wolverines live in snowy, high-elevation habitats.

Wolverines Receive Federal Protection as a Threatened Species in the Lower 48 States

The carnivorous mammals will increasingly face habitat loss and fragmentation because of climate change, according to scientists

Svalbard reindeer graze during an early snowfall. If temperatures rise again, food may be trapped under ice during a critical time for packing on winter pounds.

The World’s Smallest Reindeer Get Their Day in the Sun

On Norway’s Svalbard archipelago, a rare animal is thriving—for now

The jawbone likely belonged to a Columbian mammoth.

Fossil Hunter Pulls Massive Mammoth Jawbone Out of Florida River

John Kreatsoulas, who made the discovery while diving in southwest Florida, initially thought the 60-pound mandible was a log

Hippos swimming close to the Magdalena River in Doradal, Colombia.

Pablo Escobar's Multiplying 'Cocaine Hippos' Will Be Sterilized in Colombia

The country’s hippo population has grown to about 170, and officials warn it could reach 1,000 individuals by 2035 if left uncontrolled

When erect, the penises of male serotine bats are seven times longer than female bats' vaginas and seven times wider than the females' vaginal openings.

This Bat Uses Its Extra Long Penis Like an Arm While Mating

Serotine bats are the first mammals known to mate without penetration, new research suggests

Castoreum, an edible, sweet-smelling substance, is found in the castor sacs of beavers.

Does Vanilla Flavoring Actually Come From Beaver Butts?

Despite internet claims, castoreum—a substance found in beaver glands—is rarely used today as a food flavoring

After several attempts to dolphin-proof the bait, the team finally figured out a solution: a mesh bait pouch.

Watch Dolphins Outsmart Crab Traps in First-Ever Footage

Bottlenose dolphins in Australia have been snatching fish used to bait crabs—and adapting to fishers' attempts to thwart them

Attenborough's long-beaked echidna, photographed by a camera trap

Scientists Find 'Lost' Echidna Species for the First Time in 60 Years

An expedition team in Indonesia spotted the elusive, egg-laying mammal, which is named after David Attenborough and had not been documented since 1961

Wildcats appear very similar to domestic cats, but they are slightly larger with longer legs.

Domestic Cats Could Breed Scottish Wildcats Out of Existence

Just a few decades of intermixing affected the DNA of all sampled modern wildcats, researchers say, suggesting the species may be "genomically extinct"

Orcas are highly social and are likely learning the boat-ramming behavior from one another.

Orcas Sink Another Boat in the Strait of Gibraltar

The crew is safe, but the marine mammals did so much damage to the Polish sailing yacht that it couldn't make it back to port

After making headlines this summer for "stealing" surfboards in Santa Cruz, the California sea otter known as 841 has been spotted with a new pup.

California's Surfboard-Stealing Sea Otter Has Given Birth to a Pup

Otter 841 made headlines for her “unusual” behavior this summer, which biologists now say could’ve been related to pregnancy hormones

North Atlantic right whales face threats of entanglement in fishing gear and injuries caused by ships.

North Atlantic Right Whale Numbers May Be Stabilizing at Last

After a decade of decline, the latest population estimate is good news—but conservationists say we "have a long ways to go" to safeguard the marine mammals

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How Scientists Tracked the Movements of a 17,000-Year-Old Woolly Mammoth

Isotopes tell the epic tale of one ancient mammal’s odyssey across Alaska

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