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The Changing Demography of the Central City

Since World War II the suburbs and exurbs of most U.S. cities have grown faster than the cities themselves. Today the decline of population in the central cities is not relative but absolute...

By George Sternlieb and James W. Hughes

The Surface of Venus

Shrouded by clouds, it has now been mapped by radar from the earth and from a spacecraft in orbit around Venus. The images suggest a geology intermediate between that of the earth and that of Mars...

By Gordon H. Pettengill, Donald B. Campbell and Harold Masursky


They are structural organelles that are found in all nucleated cells. Assembled like scaffolding ftom protein subunits, they participate in cell division, cell movement and the maintenance of cell shape...

By Pierre Dustin

The Placenta

This remarkable organ is the intermediary between two different individuals: the fetus and the mother. After delivery it can also serve as an "experimental animal" for a wide variety of studies...

By Peter Beaconsfield, George Birdwood and Rebecca Beaconsfield

The Isolated Electron

From a single electron trapped in an artificial atom of macroscopic size a property of the electron called the g factor can be measured with unexcelled accuracy

By David Wineland and Philip Ekstrom

The Antecedents of Civilization in the Indus Valley

One of the three earliest civilizations was that of the Indus. Excavations at Mehrgarh in Pakistan have uncovered farming settlements that flourished in the region 3,000 years earlier

By Jean-François Jarrige and Richard H. Meadow

Disk-Storage Technology

On the surface of a spinning disk the data for a computer are stored as minute magnetic regions. In devices being developed the data will be "written" and "read" by a laser

By Robert M. White

Newton's Apple and Galileo's Dialogue

Newton did see the apple fall, but what was it that inspired him to link the apple's descent to the moon in orbit and arrive at the law of universal gravitation? It may have been a diagram in the "Dialogue"...

By Stillman Drake


  • 50 and 100 Years Ago, August 1980

  • Science and the Citizen, August 1980

  • Letters

    Letters to the Editors, August 1980

  • Recommended

    Books, August 1980

  • Mathematical Recreation

    Mathematical Games, August 1980

  • Amateur Scientist

    The Amateur Scientist, August 1980

  • Departments

    The Authors, August 1980

  • Bibliography, August 1980

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