Who is UPenn climate professor Michael Mann? A look at his career, controversies, and contributions to climate science

Michael Mann, a leading climate scientist and professor at the University of Pennsylvania, has gained recent attention due to a controversial comment regarding President Donald Trump’s refusal to comply with a federal court ruling. Known for his contributions to climate science, particularly the “hockey stick” graph, Mann has faced legal and political battles, including defamation lawsuits. Despite controversies, Mann continues to advocate for urgent climate action, maintaining his position as a significant voice in climate policy discussions and scientific communication.