The preschool level is often the first formal opportunity for children to experience science. There are many examples of appropriate experiments and scientific experiences aimed at young children, both in Mexico and around the world. Even the formal public preschool program in Mexico includes sections called Academic Training Topics, one of which…

The chronic underrepresentation of Native and indigenous peoples in STEM fields (Fig. 1) has been a longstanding issue in the United States, despite concentrated efforts by many local and national groups, including the Society for Advancement of Chicanos/Hispanics and Native Americans in Science (SACNAS) and the American Indian Science and…

Summarizes Charles Wheatstone's 1843 paper introducing the Wheatstone bridge and the rheostat. (SL)

Although the Einstein-Podolsky-Rosen experiment was originally a hypothetical situation, John Bell was able to apply a version of their argument to an experiment that could actually be done. This experiment (called "Bell's Inequality") and a hypothetical experiment analogous to the one Bell proposed at the atomic level are described. (JN)

Discusses a number of possible explanations for the Christmas Star as described in the Bible. (SL)

Describes the characteristics and operational problems of optical waveguides, and concludes that the wide use of optical communications can be expected if difficulties in commercial production of components can be eliminated. (CC)

Following a short review of the history of cosmic-ray astrophysics and a discussion of the accumulated data, pointing to the need for isotope measurement, the theory of heavy-element nucleosynthesis is reviewed to provide a basis for the interpretation of the cosmic-ray data. (Author/JN)

Asks questions relating electrical resistivity and observed size effects. Electron mean free path and thermodynamic fluctuations are discussed. Experiments with granular aluminum are outlined and described which allow the study of size effects, as well as the coupling and the transport processes between them. (CS)

This article is a preview of the book, "Physics News in 1980." Five research areas are reviewed: high energy particle accelerators, fusion reactors, solar cells, astrophysics, and gauge theories. (Author/DS)

Provides a chronicle of the work of Miss Leavitt in the field of variable stars during the early part of the 20th century. (CP)

Describes the various attempts, efforts and experiments that were carried out by the leading investigators in the field in their search for electromagnetic induction phenomena. (GA)

Provides the rationale for and examples of experiments designed to test the stability of protons and bound neutrons. Also considers the unification question, cosmological implications, current and future detectors, and current status of knowledge on proton decay. (JN)

Describes the reception accorded to John Tyndall in 1872-1873 in America. Tyndall, called the Apostle of Science, delivered a series of lectures on light with fascinating demonstrations in several cities during his visit. Press coverage and public reaction were overwhelming. Tyndall left the money earned from his lectures in a trust which is still…

Discusses the existence of spirals in nature in general, supplying many examples, and explains how a particular organism, Phycomyces, accomplishes this feat. (GA)

Discusses a joint research program between several high school teachers and solar system astronomers in which data were collected on photoelectric observations of asteroids and minor planets via astronomical telescopes. (MLH)