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Features

The Verification of a Comprehensive Nuclear Test Ban

Networks of seismic instruments could monitor a total test ban with high reliability. Even small clandestine explosions could be identified even If extreme measures were taken to evade detection

By Lynn R. Sykes and Jack F. Evernden

Calcium in Synaptic Transmission

A current of calcium ions triggers the passage of signals from one nerve cell to another. The process is studied in a synapse (a neuronal junction) hundreds of times a synapse's usual size

By Rodolfo R. Llinás

Charge-Coupled Devices in Astronomy

Microelectronic technology has presented astronomers with a sensitive new radiation detector that is expected to improve the accuracy of many crucial observations

By Jerome Kristian and Morley Blouke

Artificial Intelligence

Computer programs not only play games but also process visual information, learn from experience and understand some natural language. The most challenging task is simulating common sense

By David L. Waltz

Magnetic Fluids

When small ferromagnetic particles are suspended in a liquid carrier, the resulting "ferrofluid" exhibits unique properties that are intuitively baflling as well as technologically useful

By Ronald E. Rosensweig

How Honeybees Find a Home

In most of the Temperate Zone a new colony of honeybees must locate a snug shelter in order to survive the winter. The search is carried out by the older "scout" bees with remarkable rigor

By Thomas D. Seeley

Historical Eclipses

Reliable records of solar and lunar eclipses go back as far as 750 B.C. They bear on such questions as whether the sun is shrinking or the earth is not spinning as fast as it once did

By F. Richard Stephenson

Departments

  • 50 and 100 Years Ago: October 1982

  • Science and the Citizen, October 1982

  • Tidal Bores

  • Letters

    Letters to the Editors, October 1982

  • Recommended

    Books, October 1982

  • Amateur Scientist

    The Amateur Scientist, October 1982

  • Departments

    The Authors, October 1982

  • Metamagical Themas, October 1982

  • Bibliography, October 1982

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