Ancient Arkansas: The World of Dinosaurs and Fossils with Jessica Scott

In this episode of That’s Wild, hosts Susan Altrui and Joy Matlock dive into the prehistoric history of Arkansas with special guest Dr. Jessica Scott, a paleoecologist. They explore how the state’s landscape has shifted from deep oceans to dinosaur-inhabited shorelines and eventually to the age of mammoths.

Key Discussion Points

Paleoecology Explained: Dr. Scott defines paleoecology as the study of past ecosystems, comparing the work to a detective piecing together an ancient puzzle from limited fossil evidence.Arkansas’s State Dinosaur: The episode highlights Arkansaurus, the first and most complete dinosaur specimen found in the state.It was a bird-like, bipedal dinosaur belonging to the ornithomimosaur group.It stood approximately 8 feet tall, could be up to 15 feet long, and likely possessed feathers.Geological Shifts: Arkansas was once entirely underwater during the Paleozoic era and later partially submerged by the Western Interior Seaway during the Mesozoic era.Fossil Variety: Beyond dinosaurs, the state is home to fossils of marine invertebrates (oysters, coral) and "recent" ice-age giants like mammoths, mastodons, and Megalonyx (giant ground sloths).The Process of Fossilization: Detailed explanation of how organic material is replaced by minerals over time to become stone.Conservation Connection: The guest emphasizes that understanding past extinctions—such as the asteroid-driven end of the dinosaurs—helps us understand and combat the human-caused extinctions occurring today.Guest Information

Dr. Jessica Scott: A paleoecologist, native Arkansan, and long-time advocate for the Little Rock Zoo.