Is the Earth’s magnetic field in the process of reversing its “polarity”? This is a question that has been in the news a great deal. What would be the consequences? It is likely that the Neanderthal’s met their demise as a result of a weakened geomagnetic field. This class will explore the origin, behavior, and history of our planet’s complex and inspiring geomagnetic field.

John Geissman is a professor emeritus of geoscience at the University of Texas at Dallas and the University of New Mexico. He received a BS, MS, and PhD in Geology (now Earth and Environmental Sciences) from the University of Michigan. He is a Past President of the Geological Society of America as well as the editor for the GSA Bulletin. He has over 300 peer-reviewed science journal contributions.