 The Smithsonian Institution invited visitors into a new Discovery Room in its National Museum of Natural History in Washington, D.C., where they could touch and handle formerly off-limits specimens.In 1969, Oppenheimer's Exploratorium opened in San Francisco, California, and the Ontario Science Centre opened near Toronto, Ontario, Canada.By the early 1970s, COSI Columbus, then known as the Center of Science and Industry in Columbus, Ohio, had run its first "camp-in."