My favorite mythological story is "How the Half Boys Came to Be," a Kiowa story about the creation of the Monster Slayer twins. They begin as one child, the son of a human maid and the Sun. The woman leaves the sky world because she misses her home, and the Sun kills her with his hoop. The child runs away and finds the tent of Grandmother Spider, who warns the boy not to throw the hoop into the air. When he does, the hoop splits him into the two half boys, and Grandmother Spider knows they can no longer remain at home. The story ends with them setting out together on a journey to conquer their enemies. Native American Twin Hero stories have always fascinated me, even before my twin nephews were born. The twins are partners, supporting one another with their respective powers and wisdom. It's interesting to compare this (and my other favorite, the Mayan Popol Vuh) with the European "Twin [or Two] Brothers," recorded by the Brothers Grimm and others. These brothers attempt to support one another until jealousy interferes, followed by remorse and reunion. Even as Native Americans feared twins in real life, they honored the idea of duality, whether because of complementarity or doubling/companionship. Some theories posit hero twins to be personifications of the sun and the moon.