Pachyrhinosaurus is an extinct genus of centrosaurine ceratopsid dinosaur from the Late Cretaceous period of North America. The first examples were discovered by Charles M. Sternberg in Alberta, Canada, in 1946, and named in 1950. Over a dozen partial skulls and a large assortment of other fossils from various species have been found in Alberta and Alaska. A great number were not available for study until the 1980s, resulting in a relatively recent increase of interest in Pachyrhinosaurus.

Henry Ross Perot Sr. was an American business magnate, politician, and philanthropist. He was the founder and chief executive officer of Electronic Data Systems and Perot Systems. He ran an independent campaign in the 1992 U.S. presidential election and a third-party campaign in the 1996 U.S. presidential election as the nominee of the Reform Party, which was formed by grassroots supporters of Perot's 1992 campaign. Although he failed to carry a single state in either election, both campaigns were the second and third strongest presidential showings by a third party or independent candidate in U.S. history.