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Animals

Participants listened to pairs of mating calls made by numerous creatures, including male green treefrogs.

Humans and Animals Often Like the Same Mating Calls, Supporting a 150-Year-Old Observation by Charles Darwin

New research by Smithsonian scientists suggests that preferences for certain sounds might be evolutionarily conserved

The cockapoo, a mix between the cocker spaniel and poodle, had the most behavioral problems of all analyzed crossbreeds compared to its purebred progenitor breeds.

Contrary to Popular Belief, Some Doodle Crossbred Dogs May Have More Behavioral Problems Than Their Purebred Parents

Pet owners often pick “designer dogs” because they think they’ll be easier to train and friendlier with kids than purebreeds. A new study suggests that’s not always the case

The feathers belonged to birds from four large parrot species, according to researchers.

Humans May Have Transported Live Parrots Over the Andes Mountains Along Sophisticated Trade Routes Before the Rise of the Inca Empire

Archaeologists were puzzled when they found parrot feathers in a pre-Inca burial in coastal Peru. A new study suggests that the birds were captured in the wild and kept alive over lengthy journeys

European hedgehog numbers are shrinking.

European Hedgehogs’ Hearing Might Be Attuned to Ultrasonic Sounds. The Discovery Could Help Scientists Save the Declining Species

Sound-based deterrents could help keep the animals away from fast-moving cars and dangerous landscaping equipment

Rats and other rodents have front teeth that grow continuously, so they gnaw to keep them healthy and in shape. 

Rodents Don’t Gnaw Just to Trim Their Teeth—It Also Feels Good, According to a New Study

The findings could help humans who grind their teeth or clench their jaws

Researchers spent six years observing interactions between bull sharks at Fiji's Shark Reef Marine Reserve.

Bull Sharks Are Large, Aggressive Predators—but They Also Know How to Make ‘Friends,’ New Research Suggests

The animals probably socialize to learn new skills and to find food and mates

Like Astrophage, the solar-radiation-eating microbes in Andy Weir’s novel Project Hail Mary, some sea slugs can derive energy from sunlight.

These Sea Slugs Can ‘Eat’ Sunlight—but They’re No Astrophage. Here’s How the ‘Project Hail Mary’ Antagonist Has a Real-Life Analogue in Earth’s Oceans

By snatching chloroplasts from algae, animals called sacoglossans produce their own energy through photosynthesis

Yaks on the Tibetan Plateau have adapted to deal with high-altitude conditions.

This Genetic Mutation Helps Yaks Survive at High Elevations. It Could Lead to Treatments for Nerve Damage in Humans

Animals that dwell at high altitudes have adapted to cope with low oxygen levels, a condition that damages a vital part of nerve cells

Male African striped mice's parenting styles vary greatly: Some fathers groom and protect their pups from the elements, while others ignore or even attack their young.

Some Mice Are Doting Dads, While Others Ignore or Attack Their Offspring. Researchers Just Figured Out Why

In African striped mice, the activity of one gene can dramatically change a male’s parenting style, according to a new study

The mice spent about a month aboard the International Space Station.

These Space-Faring Mice Are Helping Scientists Figure Out How to Keep Astronauts’ Muscles Working Properly

A new study suggests a gravity threshold for maintaining muscle function

Scientists tracked the breeding behaviors of king penguins on Possession Island, part of the French-controlled Crozet archipelago.

King Penguins Seem to Be Benefiting From a Warming World. While That’s Good News for Now, It Could Spell Trouble for the Future

The birds are breeding earlier, and more of their chicks are surviving. But researchers fear this success may not last

The shin bone was found in New Mexico.

This 74-Million-Year-Old Dinosaur Bone May Have Belonged to a Surprisingly Large Ancestor of Tyrannosaurus Rex

The massive reptile may have weighed more than 4.5 tons and been 35 feet long—much bigger than its related peers at the time

An 1894 film of a falling cat

How Do Cats Always Land on Their Feet? Researchers Examined Feline Spines to Find Out

Scientists determined that the upper part of a cat’s spine is more flexible than the lower part

Even common backyard birds like house finches are disappearing.

North American Bird Losses Are Accelerating. New Research Suggests Fertilizers and Pesticides May Be to Blame

Scientists found the severest changes in decline rates in places that include hallmarks of high-intensity agriculture

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

Common eastern bumblebee queens use underwater breathing and anaerobic metabolism to survive when submerged.

Bumblebee Queens Breathe Underwater to Survive Drowning, Revealing How They Can Live Submerged for a Week

After scientists accidentally discovered that the common eastern bumblebee can withstand flood conditions, they wanted to investigate what makes that super-ability possible

An artistic representation of Sonselasuchus cedrus, which may have lived in the forests in what is now Arizona around 215 million years ago

This Ancient Reptile Started Life on All Fours. As It Grew, It Stood Upright and Started Walking on Two Legs Instead

Scientists have identified a strange early crocodile relative that may have looked somewhat like a flightless bird

Between 500 and 1,000 koalas were estimated to live in Victoria, Australia, in the 1920s.

These Koalas Bounced Back From the Brink of Local Extinction Extremely Fast. Surprisingly, So Did Their Genetic Resilience

Conservationists saved the fuzzy creatures in Victoria, Australia. Now, the animals are showing remarkable signs of genetic recovery

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”

Researchers dubbed one experiment involving a roughly one-foot-tall crystal "The Monolith" in honor of Stanley Kubrick's iconic film 2001: A Space Odyssey.

Chimps Seem to Love Crystals. Their Attraction Might Help Explain Humans’ Obsession With the Shimmering Stones

Hominins have been collecting calcite and quartz for at least 780,000 years. A new study hints at why

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