The Control of Fertility
The problem of balancing population with natural resources resides in the human reproductive cycle. The study of this cycle has suggested new ways in which it can be interrupted...
Features
Biological Clocks and the Fiddler Crab
What is the mechanism that times the rhythms of life? The answer is sought in the regular changes of color and metabolism of a small inhabitant of the seashore
Tritium in Nature
The heaviest isotope of hydrogen is made not only by man in nuclear reactors but also by cosmic rays in the atmosphere. Its radioactive atoms can be used to trace natural processes...
The Form Of Cities
A city is the characteristic physical and social unit of civilization. It possesses size, density, grain, outline and pattern. The people who live in it shape these properties and are shaped by them...
The Late Edwin H. Armstrong
The tragic death of the principal creator of modern radio occasions this brief review of the trials and tribulations and achievements of an independent inventor in the U. S.
Heat Death
A brook trout perishes at room temperature; a frog, when one of its limbs is placed in warm water. Every animal has its own fatal temperature, determined by the stuff of its cells
Ancient Jericho
By digging through its layered remains archaeologists have found that it flourished 4,000 years before it fell to the Israelites. Indeed, it may be the oldest town in the world
Geometry And Intuition
A classic description of how "common sense," once accepted as the basis of physics but now rejected, is also inadequate as a foundation for mathematics
Departments
50 and 100 Years Ago: April 1954
Science and the Citizen: April 1954
- Letters
Letters to the Editors, April 1954
- Recommended
Books
- Amateur Scientist
The Amateur Scientist
- Departments
The Authors
Bibliography
