Aetiological myths or tails, also known as origin myths, explain the reasons for the existence of something today. These myths often feature gods, monsters, or heroes who performed an action in the past that has shaped the current world. The reasons the stories provide are not scientific, but rather explanations that have meaning for humans. There are three subtypes of aetiological myths: natural, etymological, and religious. Natural myths often attribute natural phenomena, such as lightning and thunder, to divine explanations like Zeus being angry or in Chinese mythology where lightning was associated with the flash of a dragon's eyes. Dragons were celestial beings believed to traverse the skies and influence weather patterns.