Image of the Day: Dinosaur Tracks

Footprints in southern Africa’s Karoo Basin show mammals and dinosaurs navigating a “land of fire,” as researchers describe the volcanic landscape.

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Sedimentologist Emese Bordy of the University of Capetown and colleagues have located 25 fossilized footprintssfrom prehistoric animals on a farm in South Africa, they reported January 29 in PLOS ONE.

Left 183 million years ago during a dramatic geological time marked by volcanic eruptions, the smallest prints are thought to be from quadrupedal synapsids, a group that includes both pre-mammals and mammals, while the largest, at 5.5 inches long, are likely from bipedal dinosaurs, such as Coelophysis, which were common during the Early Jurassic in southern Africa, according to The New York Times. The researchers also identified tracks from a new dinosaur that was a quadruped herbivore, which they named Afrodelatorrichnus ellenbergeri.

“Dinosaur tracks usually get most of the attention, but I think it’s remarkable to think that we had mammal ancestors that had to endure volcanic eruptions, asteroid impacts and other environmental changes in the deep past, and if ...

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  • Amy Schleunes

    A former intern at The Scientist, Amy studied neurobiology at Cornell University and later earned her MFA in creative writing from the University of Iowa. She is a Los Angeles–based writer, editor, and communications strategist who collaborates on nonfiction books for Harper Collins and Houghton Mifflin Harcourt, and also teaches writing at Johns Hopkins University CTY. Her favorite projects involve sharing the insights of science and medicine.

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