 The universe is regarded as a composite of bounded spaces in an overlapping hemispherical structure, the total spaces are referred to as "élú nà àlà".In one Igbo cosmological theory reported by W.R.G.Morton in the 1950s from an elder in Ibagwa Nike in northern Igboland, Chukwu sees that the sun travels across the world in the day time and then cuts into two in order for the moon to pass on a perpendicular route, and so the world is divided into four parts and four days.