A wildlife photographer has uncovered one of the oldest and largest collections of dinosaur footprints in Italy's Stelvio National Park, near the upcoming Winter Olympic venue of Bormio. Experts estimate there are as many as 20,000 footprints, dating back about 210 million years to the Triassic Period, left by long-necked bipedal herbivores traveling in packs. The tracks, some up to 40 centimeters wide, were found high on a remote, shaded rock wall and suggest the dinosaurs moved together and sometimes formed protective circles. The discovery is being hailed as a significant paleontological find, though public access to the site remains uncertain due to its challenging location.