Aug 22, 2026 · 5 min
A Cretaceous world would challenge humans beyond the dinosaurs
Could we live in a dinosaur world?
The episode tests a familiar survival fantasy against the Cretaceous climate, ecology, disease evidence, and asteroid-driven extinction.
- 1Late Cretaceous humans would face giant dinosaurs, pterosaurs, toothed birds, scarce mammals, and a warmer, carbon dioxide-rich climate.
- 2Fossilized bone lesions can reveal ancient infections, even though viruses and most pathogens leave no direct fossil record.
- 3The Cretaceous ended with an asteroid impact that transformed life on Earth, making its final morning a uniquely revealing thought experiment.
Don't miss
Steve Brusatte imagines witnessing the final morning before the asteroid impact ended the Cretaceous.
The brief
Flora Lichtman starts with a movie premise: what if a modern neighborhood were transported into a dinosaur world? Paleontologist Steve Brusatte turns the fantasy into a testable thought experiment.
The first shock would be ecological as much as predatory: T. rex, pterosaurs, toothed birds, few mammals, warmer temperatures, and higher carbon dioxide levels.
Fossils cannot usually preserve viruses, but lesions on dinosaur bones can record infections, offering a narrow window into disease in deep time.
The episode’s most vivid image is Brusatte’s imagined final morning of the Cretaceous, just before the asteroid impact transformed the planet.
The thought experiment shifts survival from a monster-movie problem to a planetary one, where climate, unfamiliar ecosystems, disease, and extinction all matter.
Featuring
Cretaceous
The End of Oak Street
Ankylosaurus
One Tyrannosaurus BatarskeletonBooks & mentions
Listen to the full episode and explore every guest, topic, and moment on PodLume.