Mammals

The cat-sized, butter-colored rodents live about 15 years on average, a much longer lifespan than what is expected for their size.

Yellow-Bellied Marmot Hibernation Could Unlock the Key to Longevity

The fluffy rodents stop aging when they curl up in their dens for winter and start again once they emerge in spring

A captured fisher is released after undergoing sedation and physical examination, a part of the Hoopa Valley Tribe’s longstanding efforts to monitor the culturally important species.

Inside the Hoopa Valley Tribe's Quest to Understand a Rare Carnivore

The tribe maintains some of the most detailed documentation of fishers in North America

A feral fox in Australia.

Cats and Foxes Kill 2.6 Billion Animals Per Year in Australia

A new study is the first to quantify the impact the two non-native predators have on local wildlife in the country

A fossil of a Diegoaelurus jawbone was recovered from a construction site in Oceanside, California.

Paleontologists Uncover the Oldest Sabertoothed Predator

Fossil jaw shows earliest evidence of a specialized carnivore with scimitar-shaped fangs

Researchers suspect that breeding is a possibility because of how close the narwhal is to the pod of belugas.

Adopted Lone Narwhal Traveling Among Belugas Could Produce Narluga Calves

The mammal, now reaching sexual maturity, could mate soon, giving researchers more insight into the previously elusive hybrid animals

A partial woolly rhinoceros mandible with several teeth still attached.

Dozens of Extinct Ice Age Animal Remains Found During Construction of a New Town in England

Archeologists found bones from a woolly mammoth, woolly rhinoceros, wolf, hyena, horse, reindeer, mountain hare, red fox and various small mammals

Baleen whales like humpbacks use hair-like bristles in their mouth to sieve prey from the water

Scientists Discover How Whales Eat Without Choking on Water

An 'oral plug' of muscle and fat could help keep water out of the whales' lungs

Frozen DNA evidence trapped in soil suggests that mammoth and wild horse populations petered out slowly, instead of vanishing quickly.

Mammoth and Horse DNA Left in Freezer Rewrite Ice Age Extinctions

New research reveals the ancient animals survived some 8,000 years later than previously thought

An eastern barred bandicoot explores its space in the Werribee Open Range Zoo.

How Australia’s Eastern Barred Bandicoot Came Back From Extinction

With help from a captive breeding program and the watchful eyes of sheepdogs, the small mammal has been reintroduced to the country’s plains

A humpback whale feeds on sand lance in the Stellwagen Bank National Marine Sanctuary.

Some Whales Can Eat Upwards of 16 Tons of Tiny Shrimp a Day

The giant mammals consume enormous quantities of marine organisms, three times more than previously thought, then their poop fertilizes the sea

Melting sea ice because of climate change forces walruses to congregate on land instead of ice.

Researchers Need Volunteer 'Walrus Detectives' to Help Count the Animals in Satellite Images

The project aims to quantify the impact of climate change on the species

Gigantic and extinct, Steller’s sea cows would have played an important role in shaping their environment.

How Steller's Sea Cows Impacted the Environment They Left Behind

A new paper explores the ways these extinct megaherbivores would have reshaped kelp forests across the North Pacific

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Ode to an Orca

A photographer takes the plunge into forbidding waters off Norway for an extraordinary encounter with orcas

After a year of strict Covid-19 lockdowns which brought a severe economic standstill, Panama is awaiting the return of visitors and the restart of the tourism industry.

For Panama's Fall Whale-Watching Season, Scientists Offer Tips for Safeguarding These Magnificent Creatures of the Deep

For humpback whales, bottlenose dolphins and coastal manatees, tourism is a mixed bag, making vigilance ever more important

A bone tool from Contrebandiers Cave likely used for making clothes out of the skin of predators.

Evidence of Fur and Leather Clothing, Among World's Oldest, Found in Moroccan Cave

Humans likely sported clothes made of jackal, fox and wildcat skins some 120,000 years ago

A mammoth replica on display at the Royal British Columbia Museum in Victoria, Canada.

These Scientists Plan to Fully Resurrect a Woolly Mammoth Within the Decade

A company has raised $15 million to bring the species back from extinction using gene editing technology

A spotted skunk does a handstand.

Scientists Identify Seven Species of Spotted Skunks, and They All Do Handstands Before They Spray

Researchers analyzed hundreds of spotted skunk specimens to classify the animals

An adult male woolly mammoth navigates a mountain pass 17,100 years ago.

Woolly Mammoths Roamed Far and Wide Just Like Living Elephants

A new analysis of a mammoth tusk tracks the movements of an Ice Age icon

An adult male transient or Bigg's killer whale.

Stranded Killer Whale Survives With the Help of Humans

The whale was spotted stuck among the rocks of an island in Southeast Alaska, but after about six hours on dry land the whale was able to swim off

The ancient mammal Gobioconodon (right) squabbles with a therian mammal over a meal in the Late Cretaceous.

Other Mammals, Not Dinosaurs, Kept Our Ancestors Down

The asteroid impact that ended the Cretaceous gave our mammalian ancestors, the therians, an edge over their mammalian competitors

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