Orphans of the Helix

"Orphans of the Helix" is a 46-page short story by Dan Simmons set in his Hyperion Cantos fictional universe (one of three, the others being "Remembering Siri", a story which is also a chapter of Hyperion, and "The Death of a Centaur", which deals with an early and allegorical version of either The Fall of Hyperion or Endymion). It was first published in the anthology Far Horizons in 1999.