150-million-year-old dinosaur footprints reveal something strange about its walk
A spectacular 150-million-year-old trail of more than 130 footprints captures a giant sauropod making a complete loop before continuing on its way. Its uneven stride hints that the long-necked dinosaur may have been walking with a limp.
A remarkable series of fossilized dinosaur footprints in Colorado is offering scientists unprecedented insight into the gait of a massive creature from 150 million years ago. The exceptional trackway, located near the town of Ouray, stands out as one of the most continuous and tightly curved trails of its kind, belonging to a sauropod -- a long-necked dinosaur like Diplodocus or Camarasaurus.
Dr. Anthony Romilio of the University of Queensland's Dinosaur Lab has meticulously analyzed over 130 footprints spread across a 95.5-meter-long loop.
What makes this discovery particularly intriguing is its unique shape as a complete loop, a rare occurrence in dinosaur trackways. While the precise reason for this looping pattern remains unknown, it presents an exceptional opportunity to study the dinosaur's walk during a tight, curving maneuver before resuming its original direction.
Due to the trackway's immense size, examining it from the ground has been challenging for researchers. To overcome this obstacle, co-author Dr. Paul Murphey from the San Diego Natural History Museum employed drones to capture high-resolution images of the entire site. These images were then used to create a detailed 3D model that could be analyzed at millimeter-scale accuracy.
The researchers uncovered several fascinating patterns in the sauropod's locomotion. One of the most striking was the variation in the width between the dinosaur's left and right footprints, which shifted from narrow to wide. This change in footprint width suggests that the dinosaur's stride length naturally varied as it moved, indicating that seemingly consistent tracks may not always provide a complete picture of the animal's typical walking style.
Another notable finding was a small but persistent difference in the lengths of the dinosaur's left and right steps, measuring about 10 centimeters or 4 inches. While it's difficult to determine whether this difference indicates a limp or merely a preference for one side, it adds another layer of complexity to our understanding of this ancient creature's movement.
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