The Maori creation story tells of Rangi and Papa (Heaven and Earth) who were the original ancestors. They clung closely together in darkness along with their six sons. The sons pushed Heaven and Earth apart, separating them and allowing light. This is how light and vision came to be. In the battle to separate Heaven and Earth, Tu matauenga ate four of his brothers, sparing only Tawhiri-ma-tea. This explains humanity's fierce and warring nature as well as their reliance on food from plants, animals, and existence of storms.