Around 66 million years ago an enormous asteroid barreled into the earth and wiped out  icthyosaurs, pterosaurs, and dinosaurs*. Debate has raged back and forth as to whether the dinosaurs were already in decline before this mass extinction or were still going strong. This week, Susie and Rob are joined by Prof. Steve Brusatte to take a look at what vertebrates were doing just before the asteroid hit. We discuss his new paper on fossil vertebrates from New Mexico, its implications for scenarios of dinosaur evolution and extinction, and what is life is like for a working palaeontologist, digging up Cretaceous fossils.  This week's paper is "Late-surviving New Mexican dinosaurs illuminate high end-Cretaceous diversity and provinciality" by Andrew Flynn, Steve Brusatte and colleagues, published in Science in October 2025. https://doi.org/10.1126/science.adw3282 *except birds of course. Widescreen artwork by Natalia Jagielska

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