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Non-Military Uses of Nuclear Explosives

Research under the Plowshare program, seeks constructive use for nuclear detonations. Underground explosions may be used for power production and mining; surface explosions may excavate harbors...

By Gerald W. Johnson and Harold Brown

Feedback in the Differentiation of Cells

What makes the unspecialized cells of an embryo differentiate to specialized cells? One view is that the products of the chemical activity of the organism are fed back to control its development...

By S. Meryl Rose

The Maser

It is a quantum-mechanical device which amplifies very short radio waves with extraordinary fidelity. The basic element of the early masers was gaseous ammonia; the latest models make use of crystals...

By James P. Gordon

The Evolution of Behavior

Beneath the varying behavior which animals learn lie unvarying motor patterns which they inherit. These behavior traits are as much a characteristic of a species as bodily structure and form...

By Konrad Z. Lorenz

The Nerve Impulse and the Squid

The giant nerve fibers of this common invertebrate are as much as a millimeter in diameter. Their large size has made possible important investigations into the physiology of nerve impulses...

By Richard D. Keynes

Insect Flight

Although its speed has sometimes been exaggerated, it is still an impressive biological performance. It appears, for example, that the monarch butterfly can fly nonstop across the Atlantic...

By Brian Hocking

Wound Shock

This state of collapse brought on by severe injuries can cause death in a few hours. Extensive research has begun to clarify its physiology and has developed a simple emergency treatment...

By Sanford Rosenthal


  • 50 and 100 Years Ago: December 1958

  • Science and the Citizen: December 1958

  • Letters

    Letters to the Editors, December 1958

  • Recommended


  • Mathematical Recreation

    Mathematical Games

  • Amateur Scientist

    The Amateur Scientist

  • Departments

    The Authors

  • Mathematical Sieves

  • Bibliography

  • Annual Index

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