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Precisely Constructed Polymers

In the chainlike giant molecules made by man, the units in the chain are generally oriented at random. Now these units can be oriented in regular sequence, giving rise to polymers with useful new properties...

By Giulio Natta

Cleaning Symbiosis

The invasion of the oceans by skin-diving biologists has led to the discovery that a surprisingly large number of marine organisms either live by cleaning other marine organisms or benefit by being cleaned...

By Conrad Limbaugh


This newly coined word refers to ancient scars left in the earth's crust by huge meteorites. The evidence for such impacts is largely the high-pressure mineral coesite and "shatter cones" in the rocks...

By Robert S. Dietz.

The Reproduction of Sound

In the design of systems to record and replay complex sounds the acoustical engineer seeks not to re-create sounds exactly but to satisfy the peculiar requirements of the ear and brain

By Edward E. David

Hacilar: A Neolithic Village Site

A small mound on Turkey's Anatolian plateau has yielded the remains of early communities that provide a long-sought link between the prehistoric cultures of the Near East and Europe

By James Mellaart

Enzymes in Medical Diagnosis

Certain diseases are accompanied by changes in the enzyme content of the body fluids. Already used in some diagnoses, these changes may make it possible to detect a cancer before it is a malignancy...

By Felix Wróblewski

The Life Span of Animals

What makes man and other animals age? One approach to the problem is to reflect on age records and to study the effects of different factors on the longevity of experimental animals

By Alex Comfort

Low-Altitude Jet Streams

Meteorologists have recently discovered that during the night strong winds often develop at altitudes between 800 and 2,000 feet. These winds appear to play a role in the birth of storms...

By Morton L. Barad


  • 50 and 100 Years Ago: August 1961

  • Science and the Citizen: August 1961

  • Letters

    Letters to the Editors, August 1961

  • Recommended


  • Mathematical Recreation

    Mathematical Games

  • Amateur Scientist

    The Amateur Scientist

  • Departments

    The Authors

  • Bibliography

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