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Marie-Hélène Marcaud . Prints from sauropod dinosaurs, giant herbivores with long necks, were found in Plagne, near Lyon, France. Discovered by Marie-Hélène Marcaud and Patrice Landry, two nature enthusiasts, the dinosaur prints have been authenticated by Jean-Michel Mazin and Pierre Hantzpergue, both of the Paléoenvironnements et Paléobiosphères laboratory (CNRS / Université Claude Bernard Lyon 1). According to the researchers' initial analyses, these dinosaur traces are the largest found to date. Furthermore, the tracks formed by the prints spread over dozens and possibly even hundreds of meters. More significant digs will be conducted over the next few years and could reveal that the Plagne site is one of the largest known dinosaur sites on earth.