Today I speak with the Chair of Geology at Lawrence University and author of two books, Marcia Bjornerud. We speak largely about her book "Timefulness" and discuss the history of the earth, how it is measured, and what the earth was like throughout history, and how it will look in the future. Marcia is a strong advocate, along with the almost complete majority of geoscientists, for addressing manmade climate change. We touch on some solutions, as well as evidence of the need of large, immediate, systemic change in how we view the earth and our place within it.