The Assessment of Technology
A panel convened by the National Academy of Sciences recommends new Federal mechanisms to consider the broad social consequences of advancing or retarding particular technological developments...
Features
Large-Scale Integration in Electronics
Within the past five years the size of electronic devices has been shrunk by a factor of 10. Now one can connect more than 1,000 transistors into a circuit only a tenth of an inch square...
The Afar Triangle
A new ocean seems to be in the making where three great rift systems intersect near the junction of the Red Sea and the Gulf of Aden. The violence of the process has created a nightmarish desert landscape...
The Physiology of High Altitude
To meet the stress of life at high altitude, notably lack of oxygen, a number of changes in body processes are required. What are these adaptations, and are they inborn or the result of acclimatization?...
Particles that go Faster than Light
Efforts to detect such particles, named tachyons, have yielded only negative results. Contrary to common belief, however, their existence would not be inconsistent with the theory of relativity...
Phosphenes
Seeing stars is seeing phosphenes, subjective images generated within the eye and brain rather than by light from outside. They presumably reflect the neural organization of the visual pathway...
The Rangelands of the Western U.S.
These vast tracts are mainly utilized for the grazing of cattle. They could be much more productive, not only from the economic standpoint but also in the recreational and the aesthetic sense...
Cell Surgery by Laser
The properties of laser light make it possible to conveniently focus it to an intense spot .0005 millimeter in diameter. This spot is small enough to produce lesions in individual organelles of the living cell...
Departments
50 and 100 Years Ago: February 1970
Science and the Citizen: February 1970
- Letters
Letters to the Editors, February 1970
- Recommended
Books
- Mathematical Recreation
Mathematical Games
- Amateur Scientist
The Amateur Scientist
- Departments
The Authors
Bibliography
