Museum Day offers knowledge for no cost

(MSNBC) What do Michael Jackson’s guitar-shaped belt buckle, an ivory telescope and a rotary jail have in common?
They’re just a few of the unusual objects visitors can see for free on Sept. 25 during Smithsonian magazine's Museum Day. More than 1,300 museums, planetariums, zoos and other attractions around the country will be offering free admission — for two — to anyone who presents a voucher. Continued