doing important work, young men learning, asking questions; and at their feet were three small children. They were a process. Every eight days there was an entirely new set of scientists working on any one problem. The amount of work done was terribly inadequate. They grew old, fell dead just when they were beginning their creative period. The creative time of any one individual was perhaps a matter of twelve hours out of his entire span. Three-quarters of one's life was spent learning, a brief interval of creative power, then senility, insanity, death.

The men turned as Sim entered.

"Don't tell me we have a recruit?" said the eldest of them.

"I don't believe it," said another, younger one. "Chase him away. He's probably one of those war-mongers."

"No, no," objected the elder one, moving with little shuffles of his bare feet toward Sim. "Come in, come in, boy." He had friendly eyes, slow eyes, unlike those of the swift inhabitants of the upper caves. Grey and quiet. "What do you want?"

Sim hesitated, lowered his head, unable to meet the quiet, gentle gaze. "I want to live," he whispered.

The old man laughed quietly. He touched Sim's shoulder. "Are you a new breed? Are you sick?" he queried of Sim, half-seriously. "Why aren't you playing? Why aren't you readying yourself for the time of love and marriage and children? Don't you know that tomorrow night you'll be an adolescent? Don't you realize that if you are not careful you'll miss all of life?" He stopped.

Sim moved his eyes back and forth with each query. He blinked at the instruments on the table top. "Shouldn't I be here?" he asked, naively.

"Certainly," roared the old man, sternly. "But it's a miracle you are. We've had no volunteers from the rank and file for a thousand days! We've had to breed our own scientists, a closed unit! Count us! Six! Six men! And three children! Are we not overwhelming?" The old man spat upon the stone floor. "We ask for volunteers and the people shout back at us, 'Get someone else!' or 'We have no time!' And you know why they say that?"

"No." Sim flinched.

"Because they're selfish. They'd like to live longer, yes, but they know that anything they do cannot possibly insure their own lives any extra time. It might guarantee longer life to some future offspring of theirs. But they won't give up their 

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