When a group of elephants live together, it's called a herd. Learn about life in a herd of elephants why these animals like to stick together. Find out how living together with others helps elephants stay safe, find food, and raise their young.

A shooting has occurred. Investigators have not yet found evidence. Then they look in a surface water drain and find bullet casings. They put the casings in a paper bag and send them to the lab to be analyzed. Find out about the techniques and tools ballistics experts use to help bring even the toughest cases to a close.

A crime has occurred. Investigators have not yet found evidence. But when digital analysts arrive, they take a computer from the scene and find their first clue. Find out about the techniques and tools digital forensic investigators use to help bring even the toughest cases to a close.