The sacred texts of the Egyptian pyramids identify the Pharaoh with both Horus and Osiris. During life on Earth, the Pharaoh is identified as Horus, but during death he is known as Osiris. The notion of Horus as the Pharaoh seems to have been superseded by the concept of the Pharaoh as the son of Ra during the Fifth Dynasty of Egypt. Ra is the Egyptian god of the midday sun. Ra was identified with another sun god, Atum, and so they became known as Atum-Ra. Later, Ra was identified with Horus, and combined they were known as Re-Horakhty. Following this, Ra was identified with Amun and became known as Amun-Ra. For a while, the worship of Ra was replaced with another solar deity, Aten. Every dawn, the goddess of the night sky, Nut, gave birth to Ra, and in the evening he descended back into the underworld. When equated with Horus and Osiris, Ra is born as Horus at dawn and becomes Osiris at dusk. Osiris is the Egyptian god of the Underworld. He is depicted as a partially mumm...