Tristan Hughes is joined by Professor Caroline Winterer, an expert in the history of geology and paleontology, who authored a book on America's deep time revolution. They explore 19th-century fossil discoveries and how they reshaped perceptions of the continent's age. The conversation touches on walking on 4 billion-year-old rocks, the allure of iconic dinosaurs like the T-Rex, and the political implications of these finds in establishing American cultural identity. Winterer highlights the role of fossil narratives in shaping historical context and national pride.