If you thought dogs were the only pets who had reasons to wag their tails, think again—cats wag their tails, too! “Cats wag ...

Laura is an assistant editor for The Scientist. She earned her PhD in biomedical sciences from Rush University by studying how circadian rhythms and alcohol affect the gut. View full profile. Learn ...

Have you ever wondered why dogs wag their tails? Experts believe one reason could be because human owners like the rhythm of the tail wag so much, that they've bred breeds of dogs that do it more ...

Cats also wag their tails as a form of communication, but unlike dogs, it’s not always a sign of happiness. Cats use their ...

However, Pit Bull tails are surprisingly controversial, and it goes beyond the typical "to dock or not to dock" conversation.