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The Polygraph

The use of such an instrument as a “lie detector” raises two types of question: scientific and ethical. Some answers to the first kind of question clearly point to the greater significance of the second...

By Burke M. Smith

Chemical Fossils

Certain rocks as much as three billion years old have been found to contain organic compounds. What these compounds are and how they may have originated in living matter is under active study...

By Geoffrey Eglinton and Melvin Calvin

A Paleo - Indian Bison Kill

Some 8,500 years ago a group of hunters on the Great Plains stampeded a herd of buffaloes into a gulch and butchered them. The bones of the animals reveal the event in remarkable detail

By Joe Ben Wheat


A vast and rapidly growing network transports oil and gas in many parts of the world. A recent trend is the use of pipelines to move solids both in slurries and in capsules containing solid products...

By E. J. Jensen and H. S. Ellis


These ubiquitous companions of man are detested as dangerous pests, but they are worth studying for their own sake. Their social behavior is subtly adapted to maintain the integrity of the group...

By S. A. Barnett

Electric Currents in Organic Crystals

A new technique for measuring the energy levels of certain organic crystals may provide the key to an understanding of the mechanisms of electron transfer in living plants

By Martin Pope

Can Time go Backward?

It seems intuitively plausible that it can, but the concept creates a variety of paradoxes. For example, a time-reversed galaxy would be invisible to us because light would flow into it instead of out...

By Martin Gardner

The Kinship of Animal and Human Diseases

Knowledge of human diseases has been greatly advanced by inducing similar diseases in experimental animals. It now appears that there is still much to be learned from animal diseases that occur naturally...

By Robert W. Leader


  • 50 and 100 Years Ago: January 1967

  • Science and the Citizen: January 1967

  • Letters

    Letters to the Editors, January 1967

  • Recommended


  • Bibliography

  • Mathematical Recreation

    Mathematical Games

  • Amateur Scientist

    The Amateur Scientist

  • Departments

    The Authors

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