The Pluralistic Economy of the U.S.
One worker in three is employed in the not-for-profit sector. This fact calls into question some traditional conceptions of the economy and suggests new approaches to gaining a fuller understanding of it...
Features
The Reprocessing of Nuclear Fuels
The economics of fission power would be much improved if spent fuel were processed to remove fission products and plutonium and reclaim uranium. The industry needed for the task does not yet exist in the U...
Negative Aftereffects in Visual Perception
You will see one if you stare at a waterfall for a short time and then look away; the surrounding scene will seem to move slowly upward. The study of such illusions yields information on perceptual systems...
Superfluid Helium 3
At a temperature a few thousandths of a degree above absolute zero this isotope of helium becomes able to flow through tiny pores without friction and exhibits bizarre magnetic effects
The Control of Walking
Recent experiments indicate that the mechanism by which the nervous system generates the rhythmic movements of the leg during walking is basically the same in animals as diverse as the cat and the cockroach...
Supernovas in Other Galaxies
These stellar cataclysms occur about once every 50 years in a galaxy. Therefore the nature of supernovas can best be investigated in galaxies outside our own
How Viruses Insert Their DNA Into the DNA Of the Host Cell
Some Viruses are able to coexist peaceably with their host cell for long periods, incorporating their genes into the host chromosome. The details of the insertion process are now fairly well understood...
Fission-Track Dating
The tracks left by the spontaneous fission of traces of uranium in many minerals are clues to the minerals' age. One of the main advantages of the technique is the broad span of time it covers...
Departments
50 and 100 Years Ago, December 1976
Science and the Citizen, December 1976
- Letters
Letters to the Editors, December 1976
- Recommended
Books, December 1976
- Mathematical Recreation
Mathematical Games, December 1976
- Departments
The Authors, December 1976
Annual Index 1976
Bibliography, December 1976
