The file 'Footprint Tyrannosaurus_Rex 3D Printer Model' is (stl) file type, size is 33.6MB.
More info:http://www.nmnaturalhistory.org/online-exhibits/new-mexico-tyrannosaur-statehttps://figshare.com/articles/3D_Models_of_large_to_gigantic_theropod_tracks/4029306