John, due for a shift on the bridge, said good-bye and left.

Frank floated over to Maya's side, and she shifted nervously. They had never discussed their brief affair, and it hadn't come up, even indirectly, in quite a while. She had thought about what to say, if it ever did; she would say that she occasionally indulged herself with men she liked. That it had been something done on the spur of the moment.

But he only pointed to the red dot in the sky. "I wonder why we're going."

Maya shrugged. Probably he meant not we, but I. "Everyone has their reasons," she said.

He glanced at her. "That's so true."

She ignored his tone of voice. "Maybe it's our genes," she said. "Maybe they felt things going wrong on Earth. Felt an increased speed of mutation, or something like that."

"So they struck out for a clean start."

"Yes."

"The selfish gene theory. Intelligence only a tool to aid successful reproduction."

"I suppose."

"But this trip endangers successful reproduction," Frank said. "It isn't safe out here."

"But it isn't safe on Earth either. Waste, radiation, other people...."

Frank shook his head. "No. I don't think the selfishness is in the genes. I think it's somewhere else." He reached out with a forefinger, and tapped her between the breasts-a solid tap on the sternum, causing him to drift back to the floor. Staring at her the whole while, he touched himself in the same place. "Good night, Maya."

# # #

A week or two later Maya was in the farm harvesting cabbages, walking down an aisle between long stacked trays of them. She had the room to herself. The cabbages looked like rows of brains, pulsing with thought in the bright afternoon light.

Then she saw a movement and looked to the side. Across the room, through an algae bottle, she saw a face. The glass of the bottle warped it: a man's face, brown-skinned. The man was looking to the side and didn't see her. It appeared he was talking to someone she couldn't see. He shifted, and the image of his face came clear, magnified in the middle of the bottle. She understood why she was watching so closely, why her stomach was clenched: she had never seen him before.

He turned and looked her way. Through two curves of glass their eyes met. He was a stranger, thin-faced and big-eyed.

He disappeared in a brown blur. For a second Maya hesitated, scared to pursue him; then she forced herself to run the length of the room and up the two bends of the joint, into the next cylinder. It was empty. She ran through three more cylinders before stopping. Then she stood there, looking at tomato vines, her breath rasping hard in her throat. She was sweating yet felt chilled. A stranger. It was impossible. But she had seen him! She concentrated on the memory, tried to see the face again. Perhaps it had been. . . but no. It had been none of the hundred, she knew that. Facial recognition was one of the mind's strongest abilities, it was amazingly accurate. And he had run away at the sight of her.