They didn’t have backhoes in the Cretaceous period. Dinosaur tracks from 112 million years ago in Utah were damaged in January by construction equipment building a boardwalk at a tourist attraction. The dino footprints at Mill Canyon Dinosaur Tracksite have been drawing visitors since they were discovered in 2009. But people noticed in January that some of the tracks had been damaged, and there was heavy construction equipment at the site. The Bureau of Land Management, which operates the site, claimed at the time that no equipment was in the protected area near the dinosaur tracks. However, t…