Thomas Jefferson was all-around weird. Jefferson’s most famous secret was his affair with his slave, Sally Hemings, but he has a host of other weird facts surrounding him. He’s credited with introducing a number of foods to the U.S. palate, including vanilla ice cream and macaroni and cheese. He also believed that woolly mammoths still lived in the American West and tasked Lewis and Clark with finding one. He was also petrified of public speaking, giving only two speeches in his two terms as president.