Following in the Footsteps of the Mighty T. rex: First Adult Tracks Found. Finding the tracks of a giant T. rex is a huge adventure for scientists! In North Dakota, a spot containing four massive, three-toed footprints shows how this dinosaur used to walk. These tracks remind us of the time, about 66.5 million years ago, when dinosaurs ruled the Earth. Things to Know: T. rex is one of the most famous giant dinosaurs in history. These tracks show the length of an adult T. rex's feet and how wide its stride was. Scientists are using 3D scanning to record the tracks for a closer look. Did you know? A T. rex's footprint is about one meter long! While walking, this dinosaur could reach a speed of 4 kilometers per hour—that's the same speed as a human walking quickly. The tracks were spaced four meters apart, showing just how giant its steps were. Why is it important? Usually, only single footprints are found, but this time a whole series of tracks was discovered. This lets us follow the T. rex's movements step by step. Footprints show us behaviors that bones can't, like how fast the dinosaur walked and how heavy it was. Scientists will move these tracks to a museum in Denver for more research. How were they found? They were discovered in an area managed by the US Forest Service in North Dakota. An international team of scientists from the Denver Museum of Nature & Science and Liverpool John Moores University worked together. Every track was recorded in detail using 3D scanning. The future of the tracks: Three of the tracks will be moved to a museum in Denver this fall. They will be lifted from the site by helicopter so scientists can study them more closely. Researchers will share new information as they remove the tracks. Q&A: Question: Why was the T. rex so big? Answer: As a top predator, the T. rex grew to a huge size thanks to its strong muscles and long legs. Question: Why are the footprints so long? Answer: An adult T. rex's feet had to be wide and long to support the massive weight of its body. Question: Are these tracks different from other dinosaur tracks? Answer: Yes, T. rex tracks have three toes and are very large, which makes them easy to tell apart from other dinosaur prints. Conclusion: This discovery helps us understand how the T. rex walked and how fast it moved. By studying these tracks, scientists can find new clues about the daily lives of dinosaurs. In the future, discoveries like this will help unlock even more mysteries about dinosaurs.