´High above them, Lora and Clyde heard a sound their world had notheard for centuries - the thin scream of a starship coming in fromouter space, leaving a long white tail like smoke across the clearblue sky. They looked at each other in wonder. After three hundredyears of silence, Earth had reached out once more to touch Thalassa .. .´ And with the starship comes knowledge, and love, and pain. Inthese five science-fiction stories Arthur C. Clarke takes ustravelling through the universe into the unknown, but always possiblefuture.