The first study of copycat urination in an animal documents how one chimpanzee peeing prompts others to follow suit. Now researchers are exploring why.

The rising rate of colon cancer in young people can't be caused by diet alone, doctors say. Microplastics, sleep, and antibiotics may play a role.

A: Before you start your dog on a weight-gaining program it is important to make sure that there is nothing that is keeping ...