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Features

Air-Traffic Control

As aircraft fly faster, they need larger "cocoons" of airspace for safety. To make the cocoons smaller and enlarge the over-all capacity of the airspace requires new automatic control systems

By Seymour Deitchman and Alfred Blumstein

Light and Plant Development

Events in the life of a plant such as flowering are responses to a change in the length of the night. The light-sensitive enzyme that mediates these responses has now been discovered

By W. L. Butler and Robert J. Downs

Minerals on the Ocean Floor

The depths of the ocean are strewn with curious nodules that are rich in manganese, copper, cobalt and nickel. Special devices may make it possible to mine the bottom for these valuable substances

By John L. Mero

The Viruses of the Common Cold

For years the cold Virus stubbornly refused to multiply in tissue culture. Now, with new techniques, researchers have been able to culture some 20 strains of the virus

By Christopher Howard Andrewes

Nonuniform Electric Fields

They act not only on charged particles but also on uncharged ones. Their long-neglected effects are now being investigated in the laboratory and may soon find applications in technology

By Herbert A. Pohl

The Evolution of Behavior in Gulls

Gulls communicate with one another by means of calls, postures and movements. Differences in the signaling behavior of various species reflect the influence of environment on gull evolution

By N. Tinbergen

Primitive Architecture and Climate

Despite meager resources, primitive people have designed dwellings that successfully meet the severest climate problems. These simple shelters often outperform the structures of present-day architects

By Daniel P. Branch and James Marston Fitch

Pores in the Cell Membrane

Molecules and ions pass in and out of the cell through tiny openings in the cell wall. Although the holes are too small to be seen with an electron microscope, their size has been measured experimentally

By Arthur K. Solomon

Departments

  • 50 and 100 Years Ago: December 1960

  • Science and the Citizen: December 1960

  • Letters

    Letters to the Editors, December 1960

  • Recommended

    Books

  • Mathematical Recreation

    Mathematical Games

  • Amateur Scientist

    The Amateur Scientist

  • Departments

    The Authors

  • Bibliography

  • Annual Index

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December 1960

Think Outside the Gift Box