WASHINGTON (AP) — An energy businessman is donating a record $35 million to the Smithsonian's National Museum of Natural History to build a new dinosaur hall on the National Mall. The Smithsonian is announcing the gift Thursday from David H. Koch, the executive vice president of Koch Industries Incorporated of Wichita. It is the single largest gift in the museum's 102-year history. The Smithsonian Board of Regents voted Monday to name the new dinosaur hall in Koch's honor. Koch, an engineer, is a billionaire who lives in New York City. He was the Libertarian Party's vice presidential candidate in 1980 and has been a major donor to conservative political causes. Koch gave the Smithsonian $15 million in 2009 to build a new exhibit hall exploring human evolution over 6 million years.