Ronald T. Merrill, Professor Emeritus of Earth and Space Sciences at the University of Washington, and author of, Our Magnetic Earth: The Science of Geomagnetism, engages in a lively discussion about multiple broad concepts of science, the Earth’s magnetic field, and geomagnetism. Podcast Points: What is magnetism? What has modern science learned from past experiments in physics? How do animals use magnetism to guide them? Professor Merrill discusses magnetism, which as he states is a broad field that covers a lot of information, from physics to geology. Magnetism, simply defined, is a class of physical experiences/occurrences that are mediated by magnetic fields. The professor discusses his areas of interest within the general topic of magnetism, such as the Earth’s magnetic field, its properties, what creates it, etc. Professor Merrill discusses the basic properties of magnetism. He explains how animals in nature sense, and use, magnetic fields. He provides examples of various a...