"It all began," began Phobat Rau, "on a beautiful summer's day in 1945, August 6, I believe, was the exact date. Perhaps you recall what happened on that day, in the city of Hiroshima. If not, I will refresh your memories. A bomb was dropped on that day, a new type of bomb. It caused a great deal of destruction, and killed tens of thousands of people. Some died at once from the blast and heat, but many more, who had escaped apparently uninjured, developed serious illness days later and died. The cause you know, of course. It was called radiation injury, the internal destruction of cell structure by gamma rays emitted by the bomb. "Many strange things happened in that blast. In some, injury was confined to particular parts of the body, as the hair. Others were made sterile, in fact, the reproductive function and apparatus seemed particularly susceptible to the rays. In many cases, the genes--those vital units within the cell which determine growth and structure and all physical and mental characteristics--the genes were altered, so that children grew abnormally, with deformities or mental sickness. "But these things you well know. Afterwards biologists and physicians and geneticists came from all parts of the world to study the effects of the atomic bomb, and the flow of learned papers on this subject is not ended even now." * * * * * The speaker paused, as if inviting some comment or question. Seeing that we intended to remain silent, he resumed. "There was one case, however, which was not studied by western scientists. In many respects, it was the most interesting of all, for the bomb blast and the accompanying deluge of gamma radiation occurred just at the instant of conception. As usual, damage was sustained by the genes, but this damage was of a peculiar and highly special sort. The only gene affected, apparently, was the one controlling growth, although, as you will see presently, other structural and chemical changes took place without which the growth could never have occurred. "The infant involved was a male, named Kazu Takahashi. He was born prematurely on March 26, 1946, with a weight of fourteen pounds six ounces. The parents were well to do, and the infant was given the best of care, first in a private hospital, and later in its own home.