Sleep is one of nature's greatest mysteries, and while we humans aim for seven to nine hours a night, some animals take it to ...

Koalas handle rejection with surprising calm. Instead of frustration, they simply move away and rest. This peaceful response ...

Koalas spend most of their time in trees — but are in deadly danger when they descend to the ground, new research shows. The marsupials are an endangered species in Australia and their populations are ...

Koalas are a nationally endangered and iconic species in Australia, yet their populations are rapidly declining due to habitat loss, fragmentation, and disease, and very little is known about the fine ...

Often referred to as "koala bears," koalas are actually not bears, but marsupials like kangaroos, opossums and wombats. And their itty-bitty babies are called joeys, born into the world hairless and ...

Canberra, Australia — Koalas were declared officially endangered Friday in eastern Australia as they fall prey to disease, lost habitat and other threats. Federal Environment Minister Sussan Ley ...

Scientists in Australia are vaccinating wild koalas against chlamydia in an attempt to stop the sexually transmitted disease from wiping out the population. A team of scientists aims to catch and ...

Australia's koalas are being threatened by the out-of-control spread of chlamydia, with many of them suffering severe illnesses or dying early as a result, which has spurred scientists to develop a ...

Chicago-area residents have long been able to see animals of all kinds from across the world at the 90-year-old Brookfield Zoo, but new history is being made at the suburban landmark. Starting ...

Koalas are instantly recognizable icons of Australian wildlife. Unfortunately, they've also become icons of endangerment in the age of climate catastrophe. The IUCN Red List labels koalas as a ...

GRAND RAPIDS, Mich. — John Ball Zoo has received some adorable new animal ambassadors—but if you want to see them, you'll want to go soon! Two koalas have arrived at the zoo to visit for the summer.