A 3D reconstruction of a dinosaur trackway from Texas shows a sauropod followed by a theropod -- though it's not clear that the theropod was really right on the first dinosaur's tail.
Dinosaur Track Maps
Fossil collector Roland T. Bird excavated much of the trackway in 1940, and sections were sent to the American Museum of Natural History and the Texas Memorial Museum. Other sections were lost. Now, researchers have reconstructed the trackway from Bird's photographs. Here, the reconstruction lines up with Bird's hand-drawn maps.
Old photographs of the track site were analyzed using a method called photogrammetry, which allows researchers to create 3D images with depth from 2D pictures.
Paluxy River Tracks
Original hand-drawn maps of the tracks, which were found near the Paluxy River in central Texas.
Black-and-white and color reconstructions of the trackway, which shows the prints of a sauropod and theropod.
An isolated view of the dinosaur trackway from the Paluxy River site.