There are different stories about the origin of Uluṟu. One says that it came after a great battle between ancestral spirits. The story tells that after many spirits were killed, the earth rose up in sadness, becoming Uluṟu. Another legend tells that the two serpent spirits "kuniya" and "liru" fought many wars there, putting the cracks and scars in the rock. Kata Tjuṯa is said to give knowledge that is considered very powerful and dangerous. It is only allowed to be known by men who have gone through initiation. So stories about the creation of this rock are a secret. The common idea behind all these creation stories is that places like Uluṟu are physical evidence of the activities of ancestral beings.