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The Homelessness Problem

Many of the homeless people wandering the streets of American cities and crowding into emergency shelters are mentally ill. They require adequate housing and appropriate psychiatric care...

By Ellen L. Bassuk

Undersea Volcanoes

New techniques for exploring the ocean floor are yielding a remarkably detailed picture of the volcanic processes responsible for generating the bulk of the earth's crust

By Roger Hékinian


The idea is to link a toxic agent to a monoclonal antibody binding to a particular tumor antigen, thus fashioning a "magic bullet" that will destroy targeted cancer cells but leave normal cells unharmed...

By Donald A. Kaplan and R. John Collier

Form and Function in Fish Swimming

Some fishes are specialized for cruising, accelerating or maneuvering, but most are generalists with a combination of locomotor qualities. Recent work correlates each fish's form with its habit of swimming...

By Paul W. Webb

Symbiotic Stars

Satellite observations have revealed that certain celestial objects with a peculiar spectrum consist of a red-giant star surrounded by a small dense nebula heated by a compact hot companion star...

By Andrew G. Michalitsianos and Minas Kafatos

Multilingual Word Processing

The advantages of computerized typing and editing are now being extended to all the living languages of the world. Even a complex script such as Japanese or Arabic can be processed

By Joseph D. Becker

The Mathematics of Three-Dimensional Manifolds

Topological study of these higher-dimensional analogues of a surface suggests the universe may be as convoluted as a tangled loop of string. It now appears most of the manifolds can be analyzed geometrically...

By Jeffrey R. Weeks and William P. Thurston

Medieval Roots of the Industrial Revolution

The revolution is generally dated to the arrival of steam power in the 18th and 19th centuries. It is now clear that long before then a significant role was played by water-powered machines...

By Terry S. Reynolds


  • 50 and 100 Years Ago: July 1984

  • Science and the Citizen, July 1984

  • Letters

    Letters to the Editors, July 1984

  • Recommended

    Books, July 1984

  • Amateur Scientist

    The Amateur Scientist, July 1984

  • Departments

    The Authors, July 1984

  • Computer Recreations, July 1984

  • Bibliography, July 1984

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