The Rise and Fall of Ischemic Heart Disease
In the U.S. the death rates attributed to heart attack and other results of the obstruction of the arteries that nourish the heart have fallen since the 1960's. Why they have is not understood...
Features
Gene Amplification and Drug Resistance
Experiments on the development of drug resistance in cultured mammalian cells serve as a laboratory model of the mechanism whereby duplicate genes are created in the course of evolution
The Discovery of a Gravitational Lens
A recently discovered pair of quasars turns out to be not a pair at all but two images of a single quasar formed by a gravitational lens: an elliptical galaxy halfway between the quasar and our own galaxy...
Carbohydrates
Sugars and chains of sugar units are the most abundant consdtuent of living matter. New carbohydrates are still being discovered, as are new roles for them in normal biological processes and disease...
The Vestibular Apparatus
Balance and orientation depend on two organs of the inner ear: the semicircular canals and the otolith receptors. The system is multimodal in that it also requires inputs from other senses...
Superconductors in Electric-Power Technology
The exploitation of materials that carry current without loss has had to await the creation of superconductors that also withstand high current densities and strong magnetic fields
The Peopling of the Pacific
It began 40,000 years ago with the first-known ocean voyages. How Melanesia, Micronesia and Polynesia were colonized later is suggested by linguistic, genetic and archaeological evidence...
Chemical Reactions Without Solvation
Cnemical reactions are strongly influenced by the solvent medium in which they proceed. New techniques make it posslble to examine the behavior of "bare" chemical reactants in the absence of solvent...
Departments
50 and 100 Years Ago, November 1980
Science and the Citizen, November 1980
- Letters
Letters to the Editors, November 1980
- Recommended
Books, November 1980
- Mathematical Recreation
Mathematical Games, November 1980
- Amateur Scientist
The Amateur Scientist, November 1980
- Departments
The Authors, November 1980
Bibliography, November 1980
