Earthquake Prediction
Recent technical advances have brought this long-sought goal within reach. With adequate funding several countries, including the U.S., could achieve reliable long-term and short-term forecasts in a decade...
Features
The Molecular Biology of Poliovirus
The agent of a once dreaded disease has become a tame laboratory organism, an excellent instrument for studying the multiplication of a virus and the cellular machinery it converts to that purpose...
Microcomputers
Evolutionary successor of the minicomputer, the microcomputer is a set of microelectronic "chips" serving the various computer functions. It has opened up new realms of computer applications...
Randomness and Mathematical Proof
Although randomness can be precisely defined and can even be measured, a given number cannot be proved to be random. This enigma establishes a limit to what is possible in mathematics
The Social System of Lions
The organization of the social unit of lions, the pride, and the behavior of the anilnals in it are a sensitive reflection of the lion's adaptation to its enviroment
Rural Market Networks
They form geometrical patterns that provide a basis for close analysis. Two recent investigations bring out the critical role of such systems in contrasting countries: China and Guatemala...
The Search for Extraterrestrial Intelligence
There can be little doubt that civilizations more advanced than the earth's exist elsewhere in the universe. The probabilities involved in locating one of them call for a substantial effort...
Forest Succession
The study of a woods in New Jersey has yielded a predictive model for the succession of trees in a mixed forest. Two basic factors are the moisture in the soil and the geometry of leaf arrangement...
Departments
50 and 100 Years Ago, May 1975
Science and the Citizen, May 1975
- Letters
Letters to the Editors, May 1975
- Recommended
Books, May 1975
- Mathematical Recreation
Mathematical Games, May 1975
- Amateur Scientist
The Amateur Scientist, May 1975
- Departments
The Authors, May 1975
Bibliography, May 1975
