Mammals

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What Is a Species? Insight From Dolphins and Humans

More than 70 definitions exist for what makes a species--each is applied to a different group of organisms & uses different methods for determining a label

What fMRI Can Tell Us About the Thoughts and Minds of Dogs

One neuroscientist is peering into the canine brain, and says he's found evidence that dogs may feel love

Horseshoe crab

Animal Specimens, From Fish to Birds to Mammals, Get Inked

Inspired by Japanese fish rubbings, two University of Texas biologists make spectacular prints of a variety of species at different stages of decay

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This Mouse Has Evolved An Immunity to Toxic Scorpion Venom

The bark scorpion's sting can be deadly—but one of its predators, the grasshopper mouse, is impervious to both the pain and paralyzing effects of its venom

Giraffes hanging out on the savannah

Weather Prevents Different Giraffe Species From Interbreeding

In zoos, different giraffe species will readily mate, but if the species cross paths in Kenya, their rain-driven mating cycles won't be in sync

A new study shows that chimps make different warning calls based on the presence of other chimps, and keep sounding the alarm until their friends are safe.

Chimpanzees Intentionally Warn Their Friends About Danger

A new study shows that the apes make specific warning calls when near other chimps, and they keep sounding the alarm until their friends are safe

“Please don’t hurt my baby!” this mother meerkat may say to her murderous female superiors.

Baby-Murdering Meerkat Alpha Females Enslave Subordinates As Wet Nurses

After killing lower-level females' pups, ruthless dominant meerkats force the childless moms to nanny the alpha's brood--those that resist are exiled

Artist Nickolay Lamm’s depiction of a polar-grizzly hybrid

What Would a Cross Between a Polar Bear and a Grizzly Really Look Like?

As climate changes and Arctic sea ice melts, species shift habitats and may interbreed. Lamm digitally manipulates photographs to imagine these hybrids

Research in mice shows that heavy drinking triggers cellular changes that interfere with bone formation.

Why Binge Drinking Makes You More Likely to Break Your Bones

Research in mice shows that heavy drinking triggers cellular changes that interfere with bone formation

All living organisms have a two-piece structures inside their cells called ribosomes that make proteins—except naked mole rats’ ribosomes, which was just found to have three pieces.

Why Do Naked Mole Rats Live So Long?

The rodents' usual cellular structure is good at taking information from DNA and making proteins—these proteins may help extend their lifespans

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How One Moth Species Can Jam Bats’ Sonar Systems

Bertholdia trigona, a moth native to the Arizona desert, emits ultrasonic clicks at a rate of 4,500 times per second to blur bats' acoustic vision

Migaloo, the white whale

Call Me Migaloo: The Story Behind Real-Life White Whales

White whales, such as the recently spotted humpback nicknamed Migaloo, are rare and elusive creatures. How many are there and why are they white?

Blue whale earplugs can reveal some of these aquatic giants’ life events.

Blue Whale Earwax Reveals Pollution Accumulated Over a Lifetime

Earwax collected from a beached whale shows that the creature ingested a host of toxins, such as DDT and mercury, throughout its life

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Could Panda Poop Be the Secret to More Efficient Biofuel?

Unique microbes in a panda's gut efficiently break down bamboo--mass producing these microbes could help scientists make sustainable biofuels

A colorized microscopic image of a viral particle of the Ebola virus. The virus, which scientists believe originates in non-human primates, causes Ebola hemorrhagic fever, a deadly disease in humans, monkeys, gorillas and chimpanzees.

A Minimum of 320,000 Mammalian Viruses Await Discovery

If we invested just $1.4 billion, we could discover 85 percent of all mammalian viruses, potentially lessening the impact of the next emerging disease

In Montana, ground squirrels have been tunneling under a Air Force base’s fences and setting off intruder alarms, prompting researchers to look for a solution.

How One Nuclear Missile Base Is Battling Ground Squirrels

In Montana, squirrels have been tunneling under a base's fences and setting off intruder alarms, prompting researchers to strengthen its defenses

“I’d rather gnaw a bean than be gnawed by continual fear.”

Scientists Investigate Whether the City Mouse Is Smarter Than the Country Mouse

Contrary to biologists' expectations, critters living in cities don't always have an adaptive edge over their rural counterparts

Five Unusual Ways Scientists Are Studying Climate Change

Fossilized urine, old naval logbooks and the recent speeds of satellites are among the unexpected records that track changing climate

The olinguito, a small mammal native to South America, was announced as the first new carnivorous mammal species discovered in the Western Hemisphere in 35 years today.

For the First Time in 35 Years, A New Carnivorous Mammal Species is Discovered in the Americas

The Olinguito, a small South American animal, has evaded the scientific community for all of modern history

New research shows that, like humans, dogs are prone to yawning when they see someone else do it—and they yawn most frequently in response to their owner.

Dogs Yawn Contagiously Too

Like humans, dogs are prone to yawning when they see someone else do it—and a new study shows that they yawn most frequently in response to their owner

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