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These Four Giant Dinosaur Footprints Discovered in North Dakota Might Represent the First Trackway Made by an Adult T. Rex Ever Found

The four footprints, each about 3 feet long, suggest the dinosaur moved at a brisk walking pace, researchers said.

  • On Tuesday, researchers announced the discovery of the first known adult T. rex trackway in North Dakota, found by high school teacher Kent Hups in 2025 within the Hell Creek Formation.
  • Previously, paleontologists confirmed only two isolated adult T. rex footprints worldwide, one in New Mexico and one in Montana; this 23-foot sequence dates back 66.5 million years.
  • The prints measure up to 3.3 feet long with a stride length around 13 feet; researchers estimate the dinosaur walked at 3.5 to 4.5 mph despite weighing more than seven tons.
  • Researchers plan to recover three footprints by helicopter this fall and transport them to the Denver Museum of Nature & Science for display; the team published findings in the Journal of Vertebrate Paleontology.
  • Lead author Peter Falkingham of Liverpool John Moores University used 3D scanning to analyze the tracks remotely without visiting North Dakota; scientists hope the physical casts reveal further insights into T. rex anatomy.
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A team of paleontologists have identified in southwestern North Dakota the first continuous trace of traces attributed to an adult specimen of Tyrannosaurus rex. The finding offers new clues about its behavior and how this predator moved from the upper Cretaceous. The study, published in the Journal of Vertebrate Paleontology, analyzes a route of about seven meters formed by four tridactyl tracks. Each one measures approximately 90 centimeters i…

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Discover Magazine broke the news in Wilmington, United States on Monday, September 14, 2026.
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