Many aspects of feline health remain a mystery, even to experts. Our cat-owning reporter learned this the hard way.

A new version of the virus is widespread in wild birds but had not previously been detected in cows.

Moo Deng the pygmy hippo, Flaco the escaped eagle-owl, Charlotte the maybe-pregnant stingray — they distracted us from the messy human world but were also clear reflections of it.

Moo Deng the pygmy hippo, Flaco the escaped eagle-owl, Charlotte the maybe-pregnant stingray — they distracted us from the messy human world but were also clear reflections of it.

Scientists are concerned that the H5N1 virus could set off another human pandemic. But it is already putting species under pressure in the wild.

Behind the scenes at a Chicago zoo, chimpanzees who spent years entertaining humans are learning to befriend their own kind.

What can two rats teach us about our addiction to social media? Read the article and post your comments and questions for Emily Anthes by Dec. 5.

Researchers describe a link between genetic relatedness and sophisticated tool use in primates in East and Central Africa, suggesting their culture is cumulative.

A second Trump administration could alter the lives of all sorts of animals, whether they live in laboratories, zoos, fields or forests.

In our Pyrocene age, enormous wildfires aren’t merely damaging ecosystems but transforming them.

Scientists are studying urban animals and the diseases they carry, to understand the potential risks to people, pets and the animals themselves.

How do you teach 300 chimpanzees to seek safety in a storm? With cowbells, sound machines and a bright orange Frisbee.

How do you teach 300 chimpanzees to seek safety in a storm? With cowbells, sound machines and a bright orange Frisbee.

It was showtime at the youth swine exhibition, and the pig barn was bustling. The competitors, ages 3 to 21, were practicing their walks for the show ring and brushing pig bristles into place. Parents...

To study how the African malaria mosquito homes in on its human targets, researchers built an enormous “flight cage.” in rural Zambia.

A century ago, a well-ventilated building was considered good medicine. But by the time Covid-19 arrived, our buildings could barely breathe. How did that happen? And how do we let the fresh air back ...

Strict pandemic lockdowns may have allowed animals to range more widely and spend time closer to roads, a new study suggests.

The H5N1 virus poses “a great unknown threat” to birds and humans alike. Understanding and thwarting it begins with excrement collection.

Scientists let parrots call their parrot friends. Here’s ...

Are we trying to save animals in the wrong places?