1Robert M. Hazen
American Mineralogist 104, 468-470 Link to Article [https://doi.org/10.2138/am-2019-6745]
1Geophysical Laboratory, Carnegie Institution for Science, 5251 Broad Branch Road NW, Washington, D.C. 20015, U.S.A. Orcid 0000-0003-4163-8644
Copyright: The Mineralogical Society of America
The Earth in Five Reactions Workshop posed two significant challenges: (1) the formulation of a conceptual definition of “reaction” and (2) the identification and ranking of the “most important reactions” in the context of planetary evolution. Attempted answers to those challenges, collated in this collection of articles, reflect both the opportunities and hurdles when scientists deal with questions of meaning and value.