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The Great Test-Ban Debate

The trend of events in weaponry and in arms control tends to refute arguments presented a decade ago against a limited nuclear-test ban and to indicate that the time may be ripe for a comprehensive test ban

By Herbert F. York

The Hormones of the Hypothalamus

The anterior pituitary gland, which controls the peripheral endocrine glands, is itself regulated by "releasing factors" originating in the brain. Two of these hormones have now been isolated and synthesized

By Roger Guillemin and Roger Burgus

Microcircuits by Electron Beam

By using an electron beam to trace the patterns of electronic circuits it should soon be possible to put 100,000 transistors and similar devices on a silicon chip a few millimeters square

By A. N. Broers and M. Hatzakis

Continental Drift and the Fossil Record

Similarities between the fossils found in widely separated areas led to the first theories of continental drift. Today's advocates of plate-tectonic theory are also supported by the fossil record

By A. Hallam

The Social Behavior of Army Ants

The complex and permanent social organization of these insects is maintained by interactions among a great nlany individuals. Each individual, however, can alter its behavior only slightly

By Howard R. Topoff

Pictorial Perception and Culture

Do people of one culture perceive a picture differently from people of another? Experiments in Africa show that such differences exist, and that the perception of pictures calls for some form of learning

By Jan B. Deregowski

The Structural analysis of Gothic Cathedrals

Comparison of Chartres and Bourges by optical stress analysis relates the aesthetic achievement to structural imperatives and suggests that later Gothic cathedrals may have been patterned on the wrong building

By Robert Mark

Exotic Atoms

An electron in an atom can be briefly replaced with another particle. The resulting new atom yields information on the nature of the nucleus

By Clyde E. Wiegand

Departments

  • 50 and 100 Years Ago, November 1972

  • Science and the Citizen, November 1972

  • Letters

    Letters to the Editors, November 1972

  • Recommended

    Books, November 1972

  • Mathematical Recreation

    Mathematical Games, November 1972

  • Amateur Scientist

    The Amateur Scientist, November 1972

  • Departments

    The Authors, November 1972

  • Bibliography, November 1972

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November 1972

Think Outside the Gift Box