Located on the main floor of the museum, the Paleontology of Nebraska exhibits include the Elephant Hall, Mesozoic Gallery, Fossil Animals, Toren Gallery of Ancient Life. These exhibits display various fossil collections. The museum is known for its vast vertebrate paleontology collection, ranking 5th in the nation. The museum has been gathering its paleontology collections since 1891, when the Director Erwin Barbour began to excavate fossils from Western Nebraska. So far, more than 85,000 vertebrate species have been cataloged. Most of the collections originate from Nebraska. The collections from the Plaeistocene and Cretaceous are from New Mexico and Montana, respectively.