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Reapportionment and Redistricting

The court decisions that reinforce the concept of "one man, one vote" are now operating to change two aspects of U.S. political structure: apportionment of elective offices and the form of election districts...

By Ruth C. Silva

Resonant Vibrations of the Earth

When a major earthquake occurs, the entire earth vibrates like a ringing bell. These extremely slow "free oscillations" yield information on the structure of the earth's crust and mantle...

By Frank Press

An Artificial Heart inside the Body

An intensive effort is now being made to develop mechanical hearts that can be implanted in the chest. Such hearts have already been placed in animals, and the prospect of further progress is good...

By Willem J. Kolff


A new technology reduces entire electronic circuits to tiny modular "chips." Its importance lies less in making circuits smaller than in making them faster, cheaper and more reliable

By William C. Hittinger and Morgan Sparks

The Reversal of Tumor Growth

The fact that cancers are usually irreversible is sometimes taken as showing that they are caused by mutation. Some "multipotential" cells in plants and animals, however, can change from malignant to normal...

By Armin C. Braun

Plasticity in Sensory-Motor Systems

An animal's own movements change what it sees and hears. Laboratory experiments that tamper with this feedback loop show that it is a key to developing and maintaining spatial orientation in advanced mammals...

By Richard Held

Games, Logic and Computers

A close kinship among them is demonstrated by a game of solitaire played with colored "dominoes." Whether or not the game can be won is analogous to whether or not a problem can be solved by computer...

By Hao Wang

The Ice Fish

This oddly shaped and nearly transparent denizen of antarctic waters lacks two characteristics once thought to be present in all vertebrates: it has no red blood cells and no hemoglobin

By Johan T. Ruud


  • 50 and 100 Years Ago: November 1965

  • Science and the Citizen: November 1965

  • Letters

    Letters to the Editors, November 1965

  • Recommended


  • Mathematical Recreation

    Mathematical Games

  • Amateur Scientist

    The Amateur Scientist

  • Departments

    The Authors

  • Bibliography

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