he amassed such a large collection, probably as large as barnum brown, and, if things got -- as things got prepared, it was understood that a lot of these animals were new to science. he collected at least eight new species of animals, dinosaurs and pterosaurs, and some of the largest dinosaurs in the world at the time. he became world-famous. he was known as, "dinosaur jim." behind me is alosaurus and cantosaurus. these are the two mounted dinosaurs that he was contacted to mount in 1961. these animals were found in utah in a quarry. jim jansen was brought into mount them,ht in to to make casts and mold original bone, and put them into mounted dinosaurs. when mounting the dinosaurs, jim jensen would bore holes through these casts. the armature itself, the metal rods that supported the animal, is hidden within the bounds. along the vertebrae column and within the legs, the armatures are hidden within the lifelike bones. when you can hide the armature and the steel supports the -- the steel supports the animal , looks more alive in the sense that you get the feeling that these are bones