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Hi Sounds interesting. I suggest you consider adding: Clair Cameron Patterson for U-Pb isotopes (dating the earth and removing lead from the environment) and Willard Libby for the C-14 method (dating artifacts and ice ages). So, I guess the technology would be a mass spectrometer. cheers Steve Mattox Grand Valley State University >>> Karen Campbell <[log in to unmask]> 8/27/2010 9:18 AM >>> Good morning, I will be teaching an undergraduate "J-Term" course that is the capstone in a STEM minor sequence. It focuses on Earth Science, but also revisits other elements of STEM. My fellow instructors and I are looking for suggestions of "McPhee-style" texts for the course that highlight the (often unintended) ways in which technological advances pave the way for scientific breakthroughs. Ideally, these would be about Plate Tectonics or Global Warming breakthroughs, but we are open to other stories that relate to Earth science (including astronomy and meteorology as this is a course aimed at Education majors). Many thanks, Karen Campbell Education Director National Center for Earth-surface Dynamics St. Anthony Falls Laboratory University of Minnesota Minneapolis, MN [log in to unmask] GVSU celebrates 50 years of shaping lives