Scientific American Magazine

Detailed figures from the decennial head count show the population is concentrated more than ever in metropolitan areas. Families are larger, households smaller and the people both younger and older

This fundamental particle has 200 times the mass of the electron but otherwise closely resembles it. Why it should be heavier is a question physicists have sought to answer in recent experiments

In it a membrane of cellophane performs many of the main functions of the natural kidney. In addition to its clinical usefulness it is an excellent tool for studying certain physiological processes

Tiros I and Tiros II have provided a broad view of the circulation of the atmosphere. Future satellites will gather even more useful information on this circulation and the earth's total heat budget

The color of the skin of man and many other animals is established by cells containing the dark pigment melanin. Recent investigations indicate that these cells are strongly influenced by three hormones

New techniques for controlling the behavior of animals make it possible to measure their response to varying stimuli. In these experiments pigeons are trained to "tell" what they see

The demand for computers of greater capacity calls for smaller and faster computer elements. One approach to the problem is to design elements that take advantage of the phenomenon of superconductivity

Some African termites build nests that are brilliantly designed to maintain the temperature and humidity within the nest while permitting oxygen to flow into it and carbon dioxide to flow out