In his latest book, Our Fragile Moment - How Lessons From Earth's Past Can Help Us Survive The Climate Crisis, Professor Michael Mann makes it clear: uncertainty, when it comes to climate change, is not our friend. The famed climate professor is back on the show this week to discuss how looking back through Earth's paleoclimate record shows how fragile our current moment really is, but why we also have agency to do something about it and an urgent need to act now. We discuss what history has taught him about a potential "methane bomb," whether the Gulf Stream could actually collapse, if we are likely to see more El Nino events in the future, and what he learned studying past extinctions.

Michael Mann is the presidential distinguished professor and director of the Center for Science, Sustainability and the Media at the University of Pennsylvania.

Read Our Fragile Moment - How Lessons From Earth's Past Can Help Us Survive The Climate Crisis

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