Why is mythology worth studying?

Dictionary: the body of stories associated with a culture or institution or person.

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Technically speaking, "mythology" is a collection of stories that serve as explanations of the workings of the world, but it has come to mean the historical legends and folklore of a society, including creation and gods.

The term is usually applied to the gods and goddesses such as "Greek Mythology", or "Norse mythology." Mythology consists of legends or stories that provide a common system of beliefs. The Greeks worshipped the gods of their mythology.