Dr. Marc J. Defant is a professor of geology/geochemistry at the University of South Florida. He worked for Schlumberger Well Services and Shell Oil for three years, with two years at Shell working as an exploration geologist.

He has been funded by the National Science Foundation, National Geographic, the American Chemical Society, and the National Academy of Sciences, and has published in many internationally renowned scientific journals including Nature. He has written a book entitled Voyage of Discovery: From the Big Bang to the Ice Age and published several articles for general readership magazines such as Skeptic and Popular Science and appeared on the Joe Rogan Experience podcast. You can reach him via this contact form.

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