The Codex states: "Several versions of the Raxxla story mention an alien artifact: The Omphalos Rift, described as a gateway or tunnel through which parallel universes can be accessed." However, details "were later shown to bear a striking resemblance to the children's story 'Princess Astrophel and the Spiralling Stars', and soon lost credibility." Some insisted the author "cunningly concealed facts about the mysterious locale in his book, as hints for those with eyes to see." Omphalos means "navel" or "centre of the world" in Greek.