A remarkable discovery in Bolivia reveals a “dinosaur freeway.” This ancient path, once a bustling shoreline, is lined with thousands of footprints from theropods. These meat-eating dinosaurs walked the area between 101 and 66 million years ago, leaving behind 16,600 tracks—more than any similar site discovered.
Located in Torotoro National Park, the Carreras Pampas tracksite stretches over 80,570 square feet and includes various trackways, which are patterns made by individual dinosaurs. Dr. Jeremy McLarty, a professor and study coauthor, noted that the area is rich in tracks, suggesting that theropods frequently traveled this route. They likely moved north-northwest or southeast, making it a busy passageway.
Insights from Experts
Paleontologist Sally Hurst emphasizes that studying these tracks helps us understand ancient environments better. Certain tracks reveal how these dinosaurs moved. Some walked leisurely, while others sprinted, and about 1,300 tracks show them swimming in shallow waters.
Dr. Peter Falkingham adds that tracks preserve important details about animal movement. He highlights how deeper impressions can showcase the nuances of a dinosaur’s walk. Tracks differ when a dinosaur is swimming; the middle toe leaves a more defined mark due to the buoyancy of the water.
The Context of the Discovery
Carreras Pampas had been known for its tracks since the 1980s, but this recent work sheds light on its significance. Comparatively, other famous sites, like Cal Orck’o in Sucre, have fewer theropod tracks. Understanding why theropods dominated this site raises interesting questions about their behavior in groups versus solitary hunting.
What Trackways Reveal
Unlike bones, trackways tell us where dinosaurs actually lived and moved. They capture moments in time—how these animals interacted with their environment. Dr. Anthony Romilio, another paleontologist, points out that while bones show what a dinosaur could do, tracks display the real actions of these creatures in their habitat.
The diversity in the footprints at Carreras Pampas hints at various species and age classes among the theropods. This discovery not only deepens our understanding of theropods but also offers a vivid glimpse into the ecological life that thrived alongside them.
Next time you think of dinosaurs, remember: their stories aren’t just in the bones but in the tracks they left behind, telling us about their daily lives millions of years ago. For more on this fascinating field of study, check the detailed research in the journal PLOS One.
