This identification key has been designed to assist teachers, students, or collectors in the identification of rocks. It consists of a series of "yes/no/then go to" questions that pertain to observations of structure,...
Teaching What a Planet Is: A Roundtable on the Educational Implications of the New Definition of a Planet
This roundtable discussion, published in the online journal 'Astronomy Education Review', looks at the science, politics, and educational implications of the recent changes in the definition of a planet by the...
This map of world seismicity illustrates earthquake data for the years 1991 through 1996. It is intended to provide a sense of the depth distribution of earthquakes. Plate boundaries are shown, along with diffuse...
This collection of approximately 4,500 photographs documents natural environments, ecologies, and plant communities in the United States at the end of the nineteenth and the beginning of the twentieth century. Produced...
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