During the Early Cretaceous, a small two-legged dinosaur walked across a stretch of fine-grained mud following a rainstorm. The resulting footprints became locked in stone, but unlike other fossilized dinosaur tracks, these 120-million-year-old fossils show skin impressions across the entire footprint, in what is…
Source: https://gizmodo.com/intricate-skin-impressions-still-visible-on-exquisitel-1833912397