Transcription: Seismosaurus. Estimated to have been 120 to 140 feet long, Seismosaurus has been tentatively but quite aptly named earthquake lizard. The colossal bones of this impressive sauropod were found in New Mexico in 1986. It appears to have been similar to Diplodocus, only bigger. and its front legs were much longer. Seismosaurus has not been fully described yet, but if scientists' assumptions prove correct, this herbivore will be known as the world's largest animal.