The Lunar Soil
A close analysis of a tablespoonful of soil from the sample gathered by the Apollo 11 astronauts at Tranquility Base tells much about the structure and early history of the moon
Features
Tandem Van De Graaff Accelerators
Based on the principle of the electrostatic belt generator invented by Robert J. Van de Graaff in 1931, these versatile and dependable machines are ideal for studying certain kinds of nuclear reactions...
The Structure and Function of Antibodies
The complete amino acid sequence of an immunoglobulin molecule has been determined, defining the structure of antibodies and providing information on their evolution and differentiation and how they work...
A World Agricultural Plan
The Food and Agriculture Organization of the United Nations has developed an integrated program to close the gap between the curves for food production and population growth by 1985
Free Radicals in Biological Systems
Short-lived and highly reactive, free radicals are essential intermediates in many chemical processes. In living systems radicals play important roles in radiation damage and in aging
Insect Eggshells
The scanning electron microscope has revealed that insects' tiny eggs are structurally complex. Their peculiar architecture allows the free exchange of oxygen and carbon dioxide but minimizes the loss of water...
Medieval Uses of Air
Technology came before science in the invention of the blast furnace, the windmill and the suction pump. Medieval workers also constructed a manned glider and a useful gas turbine and conceived the parachute...
The Origin of Personality
Children differ in temperament from birth. What is the nature of these temperamental differences, and how do they interact with environmental influences in the formation of personality?
Departments
50 and 100 Years Ago: August 1970
Science and the Citizen: August 1970
- Letters
Letters to the Editors, August 1970
- Recommended
Books
- Mathematical Recreation
Mathematical Games
- Amateur Scientist
The Amateur Scientist
- Departments
The Authors
Bibliography
