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The Influenza Virus

The organism which causes the disease that sweeps nations is curiously changeable. This makes it difficult to anticipate epidemics with vaccines, and suggests a future hazard to man

By Sir Macfarlane Burnet

The Earth's Electricity

The earth is charged with respect to the atmosphere, and the atmosphere is sufficiently ionized to be a conductor. How, then, is the earth capable of maintaining its charge?

By James E. McDonald

Experiments in Aging

The exotic little rotifer, a microscopic animal that lives in ponds, yields some significant information about a factor that may shorten or lengthen the natural life span of an organism

By Albert I. Lansing

Field Theory

The physicist speaks of classical fields and quantum fields. Exactly what are they, and what is their role in modern physics and in our present view of reality?

By Freeman J. Dyson

Darwin's Finches

These drab but famous little birds of the Galapagos Islands are a living case study in evolution. Isolated in the South Pacific, they have developed 14 species from a common ancestor

By David Lack

Psychology and the Instrument Panel

Designing indicators, switches and other controls to fit the abilities of the men who will use them is a joint problem for psychologists and engineers

By Alphonse Chapanis


The initials stand for adenosine triphosphate, the substance that provides energy for muscle contraction, for fermentation of sugar by yeast and for a host of other biological processes

By Paul K. Stumpf

Atomic Bomb Blast Waves

They are shaped by weather and by acoustical laws to hop, skip and jump over long distances. At focal points they can suck out windows and crack plaster

By Everett F. Cox


  • 50 and 100 Years Ago: April 1953

  • Science and the Citizen: April 1953

  • Letters

    Letters to the Editors, April 1953

  • Recommended


  • Amateur Scientist

    The Amateur Scientist

  • Departments

    The Authors

  • Bibliography

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