Our feline friends say a lot with their body language. Here's why cats wag their tails, according to an expert.

Did you know crocodiles and alligators can be born without tails? The crocodile in this incredible Instagram video has a ...

If their tail is puffy at home, that probably means you've done something to alarm them. Fast Slapping If your cat is moving their whole tail back and forth quickly, that's a sign that they're ...

If you spotted a rat-tail hairstyle in real life, you'd recognize it instantly. "[It's] characterized by a strand of hair extending from the back of the head," says Zumbo.

If their tail is wagging back and forth but down between their legs rather than raised that's more likely to signal nerves, she said. "Tail wags are kind of hard to read," Alander said, adding ...

Photo of a happy terrier wagging its tail. Why this behavior evolved is somewhat of a mystery. Upyanose/Getty. Alternatively, they hypothesize that humans may have actively selected for the ...

Humans’ closest primate relatives lost their tails about 25 million years ago, but exactly how has remained a mystery. A breakthrough in genetic research may finally offer answers.