The low, pleasant rumble of a cat’s purr is something many pet owners are familiar with. We know cats purr for a variety of reasons (and despite what you may have believed, it isn’t always because ...

Is it a coffee machine gurgling its last drops? Is it a muffled phone vibrating on a couch? Is it a small helicopter trying to take off very politely? No, it’s Sylvester the cat, purring away after ...