Scientific American Magazine

An account of the newly published extension of the general theory of relativity against its historical and philosophical background

In which the technical and strategic discussion of last issue is continued, and a proposal is made for a first step toward the international control of atomic weapons

The phenomenon has long fascinated naturalists; now it sheds light on the forces that regulate growth and direct the specialization of cells

There are nine of them, including the newly manufactured berkelium. Four have filled gaps in the periodic table of 92 elements and five have extended it beyond uranium

There is little doubt that the averages of conditions which make up the weather have changed during the course of history. What about man's efforts to alter them further?

It is too often assumed that the law of nature is: kill or be killed. Presenting an argument for the opposite principle: a natural law of cooperation

It varies considerably with age and species. Man, however, has manipulated his curve of survival so it rather resembles that of the starved fruit fly