This new discovery is WEIRD. Mirasaura (the 'marvellous lizard') has been described from the Triassic of France, and it has mad projections coming out of its back, far longer than its body. We take a look at what these projections were, and were not (i.e. not feathers), their implications for the evolution of integumentary structures, and our own historically bad haircuts. The paper is "Triassic diapsid shows early diversification of skin appendages in reptiles" by Stephan Spiekman and colleagues, published in Nature in July 2025. https://doi.org/10.1038/s41586-025-09167-9 Wide screen art: Gabriel Ugueto
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45:45
SQUID! (bonus episode)
Squid are a really important part of marine ecosystems, but their fossil record is close to non-existent - their squishy bodies are just really unlikely to be fossilised. In this short bonus episode we take a new look at the squid fossil record. 'Digital fossil mining' reveals a massive diversity of squid in Creataceous oceans. How did the scientists do it and what does this mean? The paper is "Origin and radiation of squids revealed by digital fossil-mining" by Shin Ikegami and colleagues of Hokkaido University, Japan. https://doi.org/10.1126/science.adu6248
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12:47
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12:47
Our deep origins and the vertebrate that wasn't
The origin of our own group, the vertebrates, has received quite the shake up. One of the important fossil players has been found to be an invertebrate imposter, and this completely changes our understanding of this evolutionary episode. We take a look at why and when, and how this boils to down to a interesting question all about teeth. Did our entire skeleton come from teeth on the outside of our bodies, even before jaws existed? Is this why we now get tooth ache? The paper is "The origin of vertebrate teeth and evolution of sensory exoskeletons" by Yara Haridy and colleagues, published in Nature in May 2025. https://doi.org/10.1038/s41586-025-08944-w Wide screen art: Brian Engh.
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31:13
Where did Pterosaurs come from?
Pterosaurs dominated Mesozoic skies but it has always been a mystery where these flying reptiles came from. This week Susie and Rob discuss Pterosaur controveries and a cool new study that attempts to solve the problem of where and how they originated. How can you do this? By looking at the climate and locations of where pterosaurs lived and their closest relatives - the weird looking lagerpetids -, we can make predictions about how pterosaurs lived, thrived, and died. And maybe even where we should be looking for them... Figure 4 from paper shows the authors predictions where in the Triassic world would have the right climate for Pterosaurs to live (left column) and Lagerpetids to live (right column). The paper is "Climate drivers and palaeobiogeography of lagerpetids and early pterosaurs" published by Davide Foffa and colleauges in Nature Ecology and Evolution, June 2025. https://doi.org/10.1038/s41559-025-02767-8 Widescreen artwork: Gabriel Ugueto
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Were Neanderthals the first fossil collectors?
Why do we collect fossils and who were the first fossil collectors? Cretaceious fossils have been found in a cave in Northern Spain alongside the Neanderthals that were living there 46,000 years ago. Were Neanderthals collecting fossils and if so why? This week Susie and Rob examine those claims and discuss fossil collecting and the recent surge in private trade in dinosaur fossils. Because we are children, we also giggle at possibly one of the earliest fossils collected, the Erfoud Manuport as well as the Makapansgat pebble. The paper is "Were Neanderthals the First Collectors? First Evidence Recovered in Level 4 of the Prado Vargas Cave, Cornejo, Burgos and Spain" by Marta Navazo Ruiz and colleagues from the University of Burgos. https://doi.org/10.3390/quat7040049 We also go on to discuss the Stegosaur fossil Apex sold, purchased and loaned to the American Museum of Natural History (AMNH) and the sale of a Ceratosaurus fossil by Utah's Museum of Ancient life.
In “The Fossil Files”, a pair of palaeontologists delve into the latest discoveries from the world of palaeontology and seek to bring fossils to back to life. Each episode, Susie and Rob will discuss an interesting new research paper ranging from topics of what dinosaurs ate, how plesiosaurs swam, where we came from, and the science of de-extinction. Whilst doing so, we peek under the hood of how the science of palaeontology is done and how research gets to see the light of day. It is for anybody interested in palaeontology and past life whether that is students, researchers themselves, or simply the fossil-curious - we laugh as we learn, and hope you will too.
Episode guide at https://fossils.libsyn.com/
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