Cognition

For each bad night of sleep in a one-month period, participants reported feeling three months older, on average, than they really are.

Bad Sleep Can Make You Feel Years Older Than You Really Are, Study Suggests

After just two nights of short sleep, a person’s “subjective age,” or how old they feel, can spike by more than four years

In a modified version of the mirror self-recognition experiment, eastern garter snakes showed signs that they recognize their own scent.

Can Snakes Recognize Themselves? One Species Has Passed a Modified 'Mirror Test' Based on Smell

Eastern garter snakes might recognize their own scents, suggesting the reptiles are more cognitively complex than thought, according to a new study

Black-capped chickadees' ability to remember where they've stashed food helps them survive barren winters.

Black-Capped Chickadees Are Masters of Memory—and Scientists Are Finding Out Why

The small birds use brain “barcodes” to remember where they stash food, according to new research

Several species of birds participated in the study, including this hyacinth macaw.

Watch Pet Parrots Learn to Play Tablet Games—With Their Tongues

Scientists are studying how the intelligent, social birds interact with touchscreens to help design mobile apps that serve as enrichment for the birds

Dogs may understand more words than humans likely realize, according to new research.

Dogs Can Understand the Words for Several Objects, Such as Toys and Leashes, Study Finds

Your dog may know the word "ball" is associated with their favorite round squishy toy, according to new research that measured brain waves

These digitally edited images show how Victor Sharrah perceives faces.

This Extremely Rare Neurological Condition Makes Faces Appear Distorted or 'Like a Demon'

For the first time, scientists have recreated what one patient suffering from prosopometamorphopsia, or PMO, sees when he looks at faces

The otherworldly form of the octopus has inspired millennia of fear and awe from humans.

Ten Wild Facts About Octopuses: They Have Three Hearts, Big Brains and Blue Blood

These bizarre creatures have been around for hundreds of millions of years, and for humans, they’ve inspired horror, admiration and culinary prestige

Asian elephants were observed burying calves between 3 months and 1 year old that had died after experiencing infections and malnutrition.

Asian Elephants Bury Their Dead, New Research Suggests

In India, five dead calves were found buried on their backs in irrigation ditches, with evidence that multiple herd members had participated in the burials

Babies might start learning the words for objects at around six to nine months old. In a new study, an A.I. was also able to match some objects to their names after getting trained on video recordings from a headcam worn by a young child.

A.I. Learns Words From a Human Baby's Perspective, Using Headcam Footage

With only limited training, the model could correctly identify certain objects, suggesting some elements of learning language are not innate to humans

African gray parrots are highly intelligent birds that can learn to closely mimic human voices.

These Parrots Won't Stop Swearing. Will They Learn to Behave—or Corrupt the Entire Flock?

A British zoo hopes the good manners of a larger group will rub off on the eight misbehaving birds

Human tears may contain an odorless chemical substance that reduces aggression, a new study finds.

Sniffing Women's Tears May Reduce Aggression in Men, Study Finds

The findings, which may extend to all humans, suggest emotional tears might serve an evolutionary purpose

A cockatoo dunks its food before eating it. Scientists suggest this practice might improve the bread's texture.

Watch Cockatoos Dip Their Food in Water to Make It Soggy

A new study marks the first time that dunking behavior has been documented in parrots

Striated caracaras are falcons, but they don't act much like other birds of prey.

These Brainy Falcons Are Smarter Than You Might Think

Striated caracaras solved up to eight puzzle box problems in a new study, suggesting they are cognitively complex, like crows and parrots

A group of chimpanzees at elevation listen for rivals.

While Some Chimps Go Low, Others Go High to Avoid a Dangerous Fight

Primate groups climb to elevation to scout out rivals and steer clear of clashes

In the new experiment, roosters made fewer alarm calls, meant to warn peers of predators, when placed in front a mirror versus when standing near another rooster.

Roosters May Recognize Their Reflections in Mirrors, Study Suggests

The findings demonstrate self-recognition could be more common among animals than previously thought

Jackdaws are social birds that mate for life and breed in colonies.

These Birds Will Switch Companions to Earn Food but Stick With Family, Study Suggests

Jackdaws, cognitively complex relatives of crows, have intricate social dynamics and mate for life

Box jellyfish are about the size of a grape.

Brainless Jellyfish Are Capable of Learning, Study Suggests

Scientists provide evidence that tiny Caribbean box jellyfish—which lack a central nervous system—can learn to navigate through mangrove roots

Researchers are rediscovering the forgotten legacy of Charles Henry Turner.

This Pioneering Black Zoologist's Insights Were a Century Ahead of Their Time

Charles Henry Turner conducted trailblazing research on the cognitive traits of bees, spiders and more

As one Nile crocodile rests, another perks up near a river in Tanzania.

Nile Crocodiles Recognize and React to the Sound of Crying Babies

The reptiles may be aware that primate infants are in trouble—and an easy meal

A magpie nest in Antwerp, Belgium, made with anti-bird spikes

Crows and Magpies Snatch Anti-Bird Spikes to Build Their Nests

Birds in Europe are prying up the metal barbs, meant to repel them from roosting on buildings, and using the devices as nesting material

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