In the second episode of the new podcast series Horizons, Dean Mark Trodden and Michael Mann, Presidential Distinguished Professor of Earth and Environmental Science, discuss Mann’s groundbreaking research, collaborations at Penn, and the pressing importance of science communication. 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 drivin... [648 chars]