James Zachos is an American paleoclimatologist, oceanographer, and marine scientist. He is currently a professor in the Department of Earth and Planetary sciences at University of California, Santa Cruz where he was elected to the National Academy of Sciences in 2017. His research focuses on the biological, chemical, and climatic evolution of late Cretaceous and Cenozoic oceans, and how past climatic conditions help improve forecasts of the consequences of anthropogenic carbon emissions on future climate change. Source: Wikipedia (en)