Ilyan Iliev, a scientist studying gut fungi's impact on immunity, teams up with Flora Graham, a senior editor at The Nature Briefing. They delve into how fossilized feces reveal dinosaurs' diets and adaptations that led to their dominance. The discussion includes fascinating insights from analyzing over 500 fossilized samples, suggesting a blend of chance events and evolutionary advantages. They also touch on COP29 climate finance outcomes, highlighting the challenges for poorer nations and the urgent need for action in climate negotiations.