We recall, from our childhood, references to similar, spiny armored dinosaurs with nodular tails that could be used as weapons. Those were ankylosaurs, which are the family that these nodosaurs belong to.
The footprint, shown above, is extremely well-defined. It clearly shows four dinosaur toes. According to Stanford, this particular nodosaur appears to have been moving rather quickly, as its heel did not sink deeply into the mud.
The scientist called the location of the find "poetic."
Stanford confirmed the authenticity of the dinosaur tracks with paleontologist David Weishampel of Johns Hopkins University, then reported the find the NASA officials.
The exact location of the fossilized print is being kept secret, as NASA officials are afraid that someone might either accidentally damage or purposely try to remove the fossilized track.