 Since humans stopped reproducing among themselves, what has been the greatest impact on human biology?
The Birds and the Bees BY DAVE E. FISHER Which goes to prove that, in some instances, being heroic is easy! [Transcriber's Note: This etext was produced from Worlds of If Science Fiction, August 1957. ] I was wandering among the tall grass of the slopes, listening to the soft whistling of the wind; allowing the grass to caress my toga and thighs. I do not, of course, believe in the gods per se; still there is a grandeur in the very stones that transcends their human sculptors, and it is no wonder to me that many cling tenaciously, and ignorantly, to the old religion. In whose names Man killed and plundered, while struggling up. In whose names Man finally left this earth, to seek his cousins among the stars. And Man returned, and settled down to live. Saddened, but resigned and content to live in peace with his knowledge and his power. Everything has evaporated in Maternite. A man my age does not hurry in the heat of the midday sun—maddugs nenglishmin go out in the midday sun, as the ancients say, although I often wonder why—but Xeon and Melia ran all the way down to the city. They were aware that they stood in the midst of an unprecedented happening; indeed, an emergency. They were created so long ago, indeed, that the ignorant believe them to have been constructed by the gods themselves.
 significant reduction of the appearance and function of sex organs
 significant reduction of the appearance and function of sex organs  more predictable measures for increasing the global population  gradual decrease in the overall intellectual quotient of a society  a lower prevalence of birth defects and learning disabilities