Describes employment opportunities in universities and research and development for graduates holding doctoral degrees in biology, chemistry, mathematics, and physics. Projections are made to the year 2000. Over supply of Ph.D.'s by the 1980's is anticipated. Steps are proposed for national graduate education policy. (JM)

Describes an outreach program designed to expose high school students to cutting-edge science. High school students are provided with hands-on experience in molecular biology (polymerase chain reaction, restriction mapping, chromatography, gel electrophoresis, human DNA sequencing, etc.) and may have an opportunity to participate in the Human…

Describes Project Tektite 1, during which a team of four scientists spent 60 days approximately 15 meters beneath the surface of the sea. Describes the "habitat" in which the men lived, reports biological and geological research carried out, and concludes that this research method has many advantages and potentialities. (EB)

Theoretical model suggests antigen-sensitive cells produce antibodies only when two antigenic determinants are recognized, and explains self-nonself discrimination by antibody system. Specific antigen-sensitive cells accumulate in absence of foreign antigens and co-operate to induce antibodies if antigen enter the body; but antigen-sensitive cells…

Applies mathematical models to the concepts of ecological dominance and ecological niche. Considers niche width, the addition of new species to a community, and the evolution of dominant and subordinate species within a community. Analyzes data from other studies to support the models. (EB)

Analysis of the writings of anti-evolutionists contemporary with Darwin reveals that there were many objections that had to be overcome and that the Darwinian revolution" does not conform to the simple model of a scientific revolution as outlined by T. S. Kuhn. (AL)

Research report on the severe ecological consequences of the defoliation program by American military forces in Vietnam. A significant fraction of mature trees in most forests are killed by single application of herbicides and almost completely killed by repeated sprayings. AAAS is urged to set up an international research program on the…

The Gaia hypothesis, which promulgates the idea that the Earth as a whole is alive, is discussed. The microworld and the idea that symbiosis is a major force behind evolution are emphasized. (KR)