Scientific American Magazine

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

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?

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

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?

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

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

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

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