The Space Biology Program of the National Aeronautics and Space Administration is an integrated research program whose primary objectives are: (1) to identify the biological systems that are affected by the space environment and to explain the responses of these systems to this unique environment, and (2) to utilize the space environment as a tool to probe biological questions that are impossible to answer on earth; thereby yielding important information to the understanding of how living systems function. The documents cited in this bibliography represent research supported, either totally or in part, by the Space Biology Program, Office of Space Science for the publication years 1975-1977. A second list of publications resulting from related independent research performed in these laboratories is presented as a supplement. Publisher.

Receptaculitids are extinct high-level fossils that provide a window into the history of life. After the discovery and analysis of a deposit of phosphatized receptaculitids on the Baltic Sea island of Öland, the authors conclude that receptaculitids possess an attribute not found in any other group of organisms, living or fossil.