 Most of the information known about Stegosaurus comes from the remains of mature animals ; more recently , though , juvenile remains of Stegosaurus have been found . One subadult specimen , discovered in 1994 in Wyoming , is 4 @.@ 6 m ( 15 @.@ 1 ft ) long and 2 m ( 6 @.@ 6 ft ) high , and is estimated to have weighed 2 @.@ 4 metric tons ( 2 @.@ 6 short tons ) while alive . It is on display in the University of Wyoming Geological Museum . 
