<p>Bending the rules: People sending their children through the U.S. Postal Service; a Sikh man in the early 1900s tries to use the Supreme Court's racist rulings to his benefit; and the little-known story behind the iconic folk song "Rock Island Line."</p>

You Do You

More than 154 million treasures fill the Smithsonian’s vaults. But where the public’s view ends, Sidedoor begins. With the help of biologists, artists, historians, archaeologists, zookeepers and astrophysicists, host Lizzie Peabody sneaks listeners through the Smithsonian’s side door, telling stories that can’t be heard anywhere else. Check out si.edu/sidedoor and follow @SidedoorPod for more info. 