Rendezvous with Rama

An enormous cylindrical object appears in Earth's solar system, hurtling toward the sun. A ship is sent to explore the mysterious craft-which the denizens of the solar system name Rama-and what they find is intriguing evidence of a civilization far more advanced than ours. They find an interior stretching over 50 kilometers; a forbidding cylindrical sea; mysterious and inaccessible buildings; and strange machine-animal hybrids, or "biots," that inhabit the ship. But what they don't find is an al