Dogs use their tails to communicate. Eastimages/Moment via Getty Images Whether they belong to reptiles, insects, birds or mammals, tails serve a wide variety of purposes. Modern animals use their ...

It turns out that, like the antennas on an insect or crustacean, a ray uses its tail to sense its environment. The inside of a myliobatid stingray tail is remarkably complex, the scientists learned.

Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, send it to curiouskidsus@theconversation.com. As these fish evolved into creatures that lived ...