Suzanne OConnell, professor of earth and environmental sciences, is featured on Vox Media’s podcast Unexplainable in a March 17 episode titled “Journey Toward the Center of the Earth.” The podcast explores unanswered scientific questions about mysterious aspects of the world and examines what scientists are doing to find answers. The episode with OConnell delves into a 20th-century quest to drill into the Earth’s layers through the ocean, specifically to learn more about a very dense region between the crust and the mantle called the Mohorovičić discontinuity, or the Moho. “Project Moho was a bust, but it lay a foundation for…