A genetic engineer concocts a plan to transform a Galilean moon.

"Jonas is the conductor of a symphony, and must be familiar with each part, every section. He must keep them working in tandem, so he flits from group to group, giving encouragement. Visitors to the University wonder at the man skidding on the marble floors, running from A to E wing and back again. He reviews twenty sequences a day, though he is pleased to find few errors. His team works late. He works later. The key genes are reserved for his eyes alone, and when he sits back to watch the simulations play out he pictures the Watchmaker."