A Colorado high school teacher and amateur fossil hunter named Kent Hups discovered four three-toed footprints in North Dakota's badlands in 2025, which paleontologists have identified as the first trackway ever found from an adult Tyrannosaurus rex. The 66.5-million-year-old impressions, described in a September 8 study in the Journal of Vertebrate Paleontology, show the dinosaur walking at roughly 3.4 to 4.5 miles per hour through a swampy forested landscape. Hups spotted the distinctive wedge-shaped rocks while seeking an alternate route through a narrow valley, drawing on three decades of fossil-hunting experience.
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