You might not expect a paleontologist to ask a rancher about his great-grandmother’s job in Wyoming, but that’s exactly what Paul Sereno did. Sereno, a researcher at the University of Chicago, was on the hunt for information about a famous dinosaur mummy discovered in 1908.
His recent work sheds light on the duck-billed dinosaur Edmontosaurus annectens, a massive plant-eater from the Cretaceous period. By digging through old photos and talking to ranchers, Sereno pieced together the history of this dinosaur. “We can now see details like its hooves and spiky tail,” he shared about the painstaking research process.
The mummy was found in a region often referred to as “the mummy zone,” where unique layers of river sand preserved these ancient creatures. Sereno explained that these mummies are nothing like the Egyptian ones. Instead, they are thin clay casts of the dinosaurs’ bodies, showcasing their skin textures.
“Actually, we now know what a dinosaur looks like from head to toe,” Sereno said, noting that they have captured everything except the color. The team discovered two specimens: “Ed Sr.,” an adult, and “Ed Jr.,” the first known juvenile dinosaur mummy.
Experts, including Clint Boyd from the North Dakota Geological Survey, praised Sereno’s findings. “The feet are beautiful,” Boyd remarked, emphasizing that these discoveries could drive future research. They clarified that the term “hoof” doesn’t mean a horse hoof; rather, it’s more like a rhino’s foot, with unique characteristics.
Sereno has a special connection to this research. The original specimen that inspired him sits at the American Museum of Natural History in New York, where he was inspired to become a paleontologist. “If you’re an eager kid, thinking everything’s already been found, think again. We still have so much to discover,” he encouraged.
As historian and scientist organizations continue exploring new techniques and tools, like 3D scanning, we’re likely just scratching the surface of understanding how dinosaurs lived. The excitement around paleontology is far from over, reminding enthusiasts everywhere that adventure awaits just beneath the earth’s surface.
For more insights about the field, you can explore the works of various paleontologists through trusted sources like the American Museum of Natural History and peer-reviewed journals.

