<p>Our dear host Tony Cohn is leaving *Sidedoor *to travel the world, so we want to take a minute to introduce you to the new voice of the show, Haleema Shah.</p>

50 Shades of Gray Whales

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. 