Outlines principles of evolutionary theory, including such recent changes as punctuated equilibria. Indicates that the incompleteness of Darwin's theory has been replaced with a conceptual framework and empirical information. Controversial issues remain, but the basic ideas still stand strong. (DH)

Provides background information for teachers on the nature and production of antibodies. Points out that the production of monoclonal antibodies blends the malignant with the beneficial to create a medical tool of exciting potential. (JN)

Plate tectonics is the current framework for understanding earth history and processes. Recent progress in this field is discussed, focusing on continental growth, mountain building, hot spots, and mineral depositions. (JN)

Provides background information on radio galaxies. Topic areas addressed include: what produces the radio emission; radio telescopes; locating radio galaxies; how distances to radio galaxies are found; physics of radio galaxies; computer simulations of radio galaxies; and the evolution of radio galaxies with cosmic time. (JN)

Reviews the basic properties and evidence for their existence. (The sequel will consider the consequences if a human being had opportunity to interact directly with a black hole.) (JN)

Discusses why light is able to pass through a thick piece of glass but not through a thin piece of paper. (JN)

Indicates that periodic table users will see changes in group notation as publishers and authors adopt revisions that already have been made or are being made. The revisions seek to remove ambiguities that have existed in that notation. A sample table is included which shows both old and new notations. (JN)

Provides examples of animals in which growth occurs without cell division. Indicates that this phenomenon (called cell constancy or eutely) is an oddity of development that has arisen independently in several animal groups. (JN)

This document includes the strategies being used by the state of Maryland to reach five goals and six essential outcomes regarding science education for their students. Also included is a discussion of seven recommendations made by committee members and reviewers of this effort to improve the quality and use of science laboratories in Maryland.…

Discusses the work of evolutionary biologists in determining how sexual reproduction arose. Topics explored include the nature of sex, bacterial sex, meiotic sex, and asexual reproduction. A diagram (which can be used as a duplicating master) illustrating types of bacterial sex is included. (DH)

This section of the journal includes several short notes related to the teaching of science in secondary schools in Great Britain. Notes are included on ways of presenting science, rural science, designing experiments in chemistry, science for students with special needs, knowledge of the metric and imperial systems, and the use of spreadsheets.…

Discusses various aspects related to nutrition and athletics. Examines nutritional requirements, energy use, carbohydrate loading, and myths and fallacies regarding food and athletic performance. Indicates that scientific evidence does not validate the use of any special diet by an athlete. (JN)

Presents a selection from a revised and updated version of "The Red Limit" by Timothy Ferris. The book is a completely nontechnical introduction to 20th century cosmology, the study of the large-scale properties of the universe. (JN)

The tendency of a poured liquid to cling to the outside of a container is known as the "teapot effect." The nature of the teapot effect and experiments investigating this phenomenon are described. (JN)

Describes the plants and animals which inhabit a natural meadow. Includes a two-page, color drawing of such a meadow with a key indicating the flora and fauna illustrated. (JN)