Sharks are ectotherms and their internal body temperatures usually reflect the waters they swim in. Holding their breath helps them function in the frigid deep.
The safety and effectiveness of the vaccine, designed specifically for koalas, has previously been tested by vaccinating a few hundred koalas brought to wildlife rescue centers for other afflictions.
Seven horses died in the lead-up to the final race of the Kentucky Derby. Churchill Downs, home to the Derby, is launching an investigation into the fatalities.
As details of Noor Jehan's neglect came to light, the revelations sparked a national conversation about the neglect and abuse of animals in Pakistan — and of vulnerable humans as well.
Rising rivers are stranding endangered riparian brush rabbits in California. Wildlife officials are searching out and relocating hundreds of them to help protect the species.
Freya became a global celebrity last year after she was seen frolicking and basking in a Oslo fjord before she was euthanized by the authorities. A bronze sculpture now honors her in Norway's capital.
Botswana has one of the last thriving elephant herds – and a history of human-elephant conflict that threatens both sides. A nonprofit has a program to shift that dynamic. Will it work?
Parrots are known to be chatty, social animals. But when they're kept as pets, they can get lonely. A group of scientists found that video chatting with other parrots helps them feel less so.
In Idaho, it's not unusual to see ranchers moving a bleating herd of sheep up to higher elevation at this time of year. But the sight of 2,500 trotting across a highway brought a crowd of onlookers.
Our correspondent bought some mail-order chicks. They grew into hens. They changed her life for the better. And then one day ... she heard this wondrous sound.
Researchers have examined the genomes of 240 mammal species. The project reveals when mammals evolved, how some developed the ability to hibernate, and clues that may help explain humans' brains.
