Thousands of dinosaur footprints were discovered on a mountain in Stelvio national park, northern Italy. These footprints date back 210 million years and measure up to 40cm across. They are found in parallel rows, showing detailed toes and claws. Experts believe they were made by prosauropods, herbivores with long necks and sharp claws. "I never would have imagined I'd come across such a spectacular discovery in the region where I live," said Milan paleontologist Cristiano Dal Sasso. A photographer, Elio Della Ferrera, spotted the footprints last September. They stretch hundreds of meters on a vertical rock face. During the Triassic period, this area was a tidal flat before becoming part of the Alps. Dal Sasso said, "This place was full of dinosaurs; it's an immense scientific treasure." He also noted signs of complex behavior, like groups of dinosaurs forming circles, possibly for defense. The prosauropods walked on two legs but left some handprints, suggesting they rested their forelimbs at times. The remote site is hard to reach, so drones and remote sensing will be used to study it. Stelvio park lies near Italy's border with Switzerland, close to the upcoming Winter Olympics venue. The Italian Ministry of Culture called the find symbolic, "as if history itself wanted to pay homage to the greatest global sporting event, combining past and present."