For the first time, researchers have estimated the toll taken by feral and pet cats on Australia's bird life - and the numbers are high enough to push several species towards extinction.
Dogs, rats, cats, cows, chickens and mice have also changed the world.
When humans are happy, they may smile, or laugh, or dance - but what do animals do? Melissa, age 12, wants to know how she can tell if her cat is happy and likes you.
The animal kingdom is full of lefties and righties, although rarely is the ratio skewed as much as it is in humans. If you're wondering about your own pet, you can find out with a simple experiment.
A longer life for humans and pets means more challenges for doctors and vets.
Scientists are beginning to link animal facial expressions to emotions, making it possible for us to understand how they feel.
Humans tend to associate cats purring with happiness, but in turns out they also purr when in pain, hungry and alone.
Exotic pets may rank highly on the novelty and excitement scale, but little is known about their ownership in Australia.
Scientists have shown the origins of today's popular 'tabby' cat.
A growing number of animal advocates want Americans to do more to aid animals raised in farms for food, rather than supporting groups that help cats, dogs and other human companions.
Our feline friends have a reputation for being distant – but are cats really that cool?
Cats evolved in hot desert regions where there were lots of small animals to eat. So they evolved feet that are perfect for pouncing on prey, climbing, scratching and jumping from great heights.
Twitter recently blew up with posts wondering about the feline fascination with taped squares on the ground. An animal behavior expert explains it's not magic that draws Fluffy to the #CatSquare.
Pet food is a multi-billion-dollar industry that consumes huge amounts of animal protein. A veterinary nutrition specialist explains how to feed dogs and cats healthily and sustainably.
Owning a cat during pregnancy has been linked with later mental health problems in the child. But moggies may have been unfairly maligned.
Today, the causes of many phobias are as inscrutable as ever – but they were only 'invented' in the 19th century.
Bird baths are more than just ornamental splash pools. They're also a site where animals socialise and intense rivalries play out. And bird bath design, location and cleanliness can have a big impact.
Believe it or not, cats are really useful. Even this one.
Scottish Folds are adorable cats with folded ears and owl-like faces. But their cuteness also condemns them to a life of suffering.
Cats, rats, foxes and other mammal predators have been implicated in 60% of the world's animals extinctions.