In our second episode of Horizons, Dean Mark Trodden chats with Michael Mann, Presidential Distinguished Professor of Earth and Environmental Science and Director of the Penn Center for Science, Sustainability, and the Media. The two discuss Mann’s groundbreaking research as a leading climate scientist, his collaborative work at Penn, and why science communication is essential to meeting the urgent challenges posed by a warming planet. Horizons is a new podcast series from Penn Arts & Sciences, featuring Dean Mark Trodden speaking with faculty experts about the big issues shaping our world and higher education—including their work exploring new ideas, inspiring students, and driving meaningful change.