The day Bob heard Fator's voice over the headphones, summoning him to face the screen, Bob's pulse was racing. Fator did him the honor of standing before his desk as he spoke. "I am addressing the other members of the advanced group," he said. "Winslow is to join you now. Instruct him faithfully, and remember he has so much to study, before he can be of value to you, and Taval. Come forward, Winslow, and join your group." As Fator vanished, Bob turned, gripped Vasper's hand. The latter looked sad. "Now I must go back--for another," he whispered. "Good luck--Bob." He was due for a surprise, to find the advanced group atop the great dome, living in translucent quarters, a mile above Taval. There he met Kalen and Forg, the two scientists in charge. He was shown the rayscopes, that literally crawled along light waves, to annihilate time and bring before the human eye universes a billion light years away. There too, he studied the black wastes of Peltior Dark, and saw the spectograms that revealed the choking gas areas through which they must pass. There was so much to learn, so much already learned, that Bob Winslow forgot ordinary hours. The phonetic language wasn't difficult. He spent his allotted hours in the library, and both Forg and Kalen, men high in years, yet with agile minds were patient in revealing discoveries some of them already centuries old. They told him that the entire universe would suffer, and they were gambling upon a chance to survive such intense cold passing through Peltior Dark, that the atmosphere would thaw inside five centuries. After that, they had concluded, provided there were no changes in the solar system, the sun would resume its natural sphere. "Is there a way of traveling ahead as I have come," Bob asked. "So that we might learn our fate?" Forg looked at Bob thoughtfully. "We have been afraid--of utter destruction," he said finally. "In that case, we could not return. But if someone bold enough to make the venture tried it--" He broke off. Bob knew Forg was thinking of him. All right, he concluded. And even then, the germ of an idea was born in his mind. At the end of the first month, Fator summoned him again. He was pleased with Bob's progress. It was even more than they had expected. He asked about Bob's health, then smiled. "I believe a rest period would benefit you," he said. "You may find your friend Kenley and spend five days--as you wish." "Could Vasper share the rest period with me?" Bob inquired. "Yes. I shall advise him. He has been back to your century. He delayed, for your benefit. You shall learn, upon seeing him." Vasper had brought back two more young men. Likewise, he had some magazines and newspapers. He delivered these in Jim's presence and the latter grabbed for the sports pages. Bob picked up his choice paper. There was a headline, and pictures. THREE DEAD, 47 HURT IN TORNADO