Penn State University Professor Michael Mann has received a number of death threats over the last 20 years. He studies climate change and is the director of Penn State’s Earth System Science Center, and it’s that research that draws those threats.

Mann said they had diminished in recent years as climate change became increasingly accepted, but with a new administration taking over the White House, he is worried they’ll return. 

He joins us to talk about his experience as a researcher and to highlight some of the year’s most important climate change studies.