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Features

Attitudes Toward Racial Integration

The fourth in a series of reports on racial attitudes shows that U.S. whites have increased their support of integration at a steady pace, with a striking period of more rapid change between 1970 and 1972

By Andrew M. Greeley, D. Garth Taylor and Paul B. Sheatsley

The Earliest Precursor of Writing

Long before the Sumerians invented writing, accounts in western Asia were kept with clay tokens of various distinctive shapes. It appears that the tokens gave rise to the Sumerian ideographs

By Denise Schmandt-Besserat

Exotic Light Nuclei

Among the light elements nuclei with unequal numbers of protons and neutrons are highly unstable. Some survive just long enough to be detected and exhibit unusual regimes of radioactive decay

By Arthur M. Poskanzer and Joseph Cerny

Cosmic Masers

Intense radiation at microwave frequencies is emitted by certain nebular regions and stellar atmospheres. It is generated by maser action, which does for microwaves what laser action does for light

By Dale F. Dickinson

The Shaping of Tissues in Embryos

Computer simulations of development make it possible to perform experiments that cannot be done in the biological laboratory. They help to reveal some of the basic forces that sculpture the embryo

By Antone G. Jacobson and Richard Gordon

Complexity Theory

Complex systems such as telephone exchanges and computers consist of large numbers of simple components. Complexity theory seeks to establish the number of components needed to perform a given task

By Nicholas Pippenger

The Preservation of Stone

The forces that erode stone in nature also erode it when it is used for buildings, and they are intensified by contaminants in the air of cities. The erosion can be retarded by novel chemical treatments

By K. Lal Gauri

The Feeding Behavior of Mosquitoes

It is described for Ades aegypti: the female of which feeds on blood. The feeding apparatus is not some kind of hypodermic needle but an exquisitely made piece of biological machinery

By Jack Colvard Jones

Departments

  • 50 and 100 Years Ago, June 1978

  • Mathematical Games, June 1978

  • Science and the Citizen, June 1978

  • Letters

    Letters to the Editors, June 1978

  • Recommended

    Books, June 1978

  • Amateur Scientist

    The Amateur Scientist, June 1978

  • Departments

    The Authors, June 1978

  • Bibliography, June 1978

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