Lanya Greggor, holding tightly to her brother Virgil's hand, sauntered with deliberate and exaggerated nonchalance through the great halls of the Martian Museum of Science. Her eyes were wide with excitement and pleasure. She was ten years old and Virgil twelve and this was her first visit to the museum. Hand in hand, always under the watchful eyes of strategically-placed uniformed attendants they walked ecstatically through the innumerable fascinating rooms, stopping to gaze with equally undisg