The Prompt and Delayed Effects of Nuclear War
The prompt effects of nuclear weapons are the basis for the size of U.S. strategic forces. The delayed effects are equally great, ensuring that these forces remain a more than ample deterrent
Volume 241, Issue 1
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Features
The Epstein-Barr Virus
It is perhaps the commonest of all the viruses that infect human beings. It is the cause of infectious mononucleosis, and there is substantial evidence linking it with two types of human cancer
The Central Parsec of the Galaxy
Infrared and radio observations indicate that the center of our galaxy harbors an ultracompact object, possibly a massive black hole, embedded in a dense, swirling mass of stars, gas and dust
The Origins of the First Powered, Man-Carrying Airplane
The Wright brothers' "Flyer" of 1903 was not just a lucky effort by two bicycle mechanics from Dayton but the outcome of an intensive program of research, engineering and testing
Compartments in Animal Development
Flies, and maybe other animals too, seem to be composed of a number of compartments: homologous units within which key genes execute decisions committing several clones of cells to a line of development
The Bag Model of Quark Confinement
Quarks appear to be real, and yet they have not been observed in isolation. One hypothesis for why they have not been is that they are confined in bags analogous to the bubbles in a liquid
The Animals of the Burgess Shale
The fossils of a rock formation in western Canada are a rich sample of an animal community in the mid-Cambrian: Some of the animals are ancestors of those living today; others are unique and bizarre
The Visual Perception of Motion in Depth
It now appears that information concerning motion in depth is processed in two distinct channels, which converge on a single motion-in-depth stage of the human visual perception system