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Explore the fascinating phenomenon of stomach stones found in ancient marine reptiles through this 53-minute paleontological lecture from the Royal Tyrrell Museum. Delve into the mystery of why long-necked plesiosaurs are frequently discovered with collections of stones within their fossilized remains, while their short-necked relatives (pliosaurs) rarely exhibit this characteristic. Examine four exceptionally well-preserved Cretaceous plesiosaur specimens collected from Alberta over the past two decades, analyzing the stones found within their bodies and investigating their potential origins from distant locations. Challenge traditional theories about these gastroliths, including their proposed roles in digestion, food processing, and buoyancy control, while considering alternative explanations for why these ancient marine predators deliberately ingested stones. Learn about the geological context of these discoveries and understand how the absence of similar stones in the surrounding rock formations indicates the animals transported them from far-off locations, raising intriguing questions about plesiosaur behavior and physiology.
