Reviews the interest of the last few years, both inside and outside the scientific community, in unidentified flying objects (UFO), placing special emphasis on the extraterrestrial intelligence hypothesis. Cites numerous examples of UFO sightings and urges that the investigation of UFO's proceed in a scientific manner, despite skeptical public…

A hypothesis is presented for the regulation of elemental losses from terrestrial ecosystems. Losses of elements are controlled by the net increment of biomass growth and the elemental composition of this net increment. According to this hypothesis, loss rates are highest in early succession and in steady state ecosystems. (Author/EB)

Presents the history of British physician, William Harvey; his background and research on the heart and circulation. (BB)

Discussed is the use and worth of any studies on animals in research. Topics included are human benefit, anthropomorphism, ecology, and the psychology of the use of animals in research. (DS)

Describes the construction and operation of an automatic insect dispenser suitable for feeding small vertebrates that are being maintained for behavioral experiments. The food morsels are squirted from their chambers an an air jet, and may be directed at a particluar portion of the cage or distributed to different areas. (JR)

Describes how a list of the great books of biology was developed. Discusses the insufficiency of textbooks and traditional classroom instruction. Advocates the uses of outside reading and libraries. Focuses on books designed to be read, not studied for information and enjoyment. (CW)

Examines college (introductory level) biology textbooks commonly used since 1950. Reports trends in new textbooks including length, graphics and content. Makes projections of future trends. Identifies major issues facing colleges related to biology textbook users. (CW)