Diversity and total numbers of plankton, particularly diatoms, were analyzed and correlated with physical factors of water. Diversity index values appear to provide an indication of pollution of water by industrial and domestic wastes. (AL)

Every year, the Emerging Scholars edition features a diverse group of rising researchers, thinkers and leaders in various fields. Their credentials and accomplishments distinguish them, but it's the level of social consciousness among the members of this year's class that makes them truly excellent. Whether it's lending a hand to society's…

"Eukiefferiella" and "Tvetenia" are closely related genera belonging to the subfamily Orthocladiinae within the Chironomidae, a family of non-biting midges. All known larvae in these genera are aquatic, being found predominantly in running water. Most species prefer cold, swift-flowing, well-oxygenated streams. Although larvae…

Nerve circuits are usually analyzed in terms of the axon, the long fiber of the nerve cell. It now appears that there are many circuits involving only the nerve cell's shorter extensions, the dendrites. (Author/BB)

Presents an informative account for the layman of the use of DDT as viewed by the government, scientists and courtroom. Considering the allegations and counter-allegations for its use, the article suggests that DDT is not as harmful as projected by agencies. The outcome of the hearings are not included. (PS)

Biological evolution can be carried out in the laboratory. With new knowledge available in genetics, possibilities are raised that genetic characters can be transferred in the future to embryos according to a predetermined plan. (PS)

Discusses potential war time and medical uses for chemical compounds giving protection against radiation damage. Describes compounds known to protect, research aimed at discovering such compounds, and problems of toxicity. (EB)

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)