Close your eyes and think of Hawaii. That sound you undoubtedly hear? Well, that’s the ocean. But that other sound floating on the breeze—that’s the steel guitar, an indigenous Hawaiian invention that has influenced country, blues, and rock music since the turn of the 20th century. This time on Sidedoor, we follow a familiar sound with an unexpected origin and learn how the steel guitar helped Hawaiians preserve their culture and change American popular music.

Glittering treasures, gleaming coins, and eye-catching jewelry…gold can be all of these things, but in some parts of the world it's also an enduring link to the past. Gus Casely-Hayford, director of the Smithsonian’s National Museum of African Art, takes us on a journey through West Africa to learn how gold was the foundation for massive empires—and his own family—and how it continues shining brightly in West African culture today.

We all know Abraham Lincoln, right? Well, we know one side of him—the grave-faced leader of a troubled country—but behind the face on the penny lies an unlikely jokester. This week, Sidedoor reveals the rascally side of our 16th president, and does it with a brand-new sound.

In 1960, investigators found dark bits of feather stuck inside a crashed airplane's engines. They needed someone to figure out what bird they belonged to—and how that bird took down a 110,000-pound plane. Enter Roxie Laybourne, a Smithsonian bird expert who not only answered that question, but also invented the science of using feathers to solve bird-related mysteries. This time on Sidedoor, we revisit some of Roxie's greatest cases and learn how she and her team helped keep the friendly skies friendly for both birds and people.

Gladys Bentley loved women, wore men's clothing, and sang bawdy songs that would make sailors blush...and did it openly in the 1920s and 1930s. This was long before the gay rights or the civil rights movements, yet Bentley became a darling of the Harlem Renaissance alongside icons like Langston Hughes and Josephine Baker. While her provocative performances kept her from becoming as well-known as her peers, they are exactly why she is being rediscovered—and admired—today. In celebration of Women's History Month, we follow the life of a trailblazer who was unapologetically herself at a time when she would’ve been acutely aware of the risks.

In the mid-1990s, investigators identified a mysterious and seemingly unstoppable killer. Its name? Chytrid. Its prey? Frogs. Since then, the disease has ravaged frog populations worldwide, and despite decades of research there’s still no cure. So, like modern-day Noahs, a group of Smithsonian researchers have resorted to a time-honored plan: building an ark…for amphibians. This time on Sidedoor, we travel to the Panamanian jungle to see how it's helping some endangered frogs avoid extinction.

In the 1970s and ’80s, Cheech Marin was famous for being half of the stoner comedy duo "Cheech and Chong." Today, he’s a passionate advocate for Chicano art and is raising awareness around a uniquely Mexican American aesthetic: rasquachismo. In this episode of Sidedoor, Cheech Marin is our guide to the wildly creative and ingenious world of rasquachismo—the Chicano art of working with what you've got.

Happy New Year! We’re busy working on a new batch of Sidedoor episodes and while you wait, we wanted to re-share a story we like from the fall, just in case you missed it the first time around. From 6,000-year-old cave paintings to silver screen stars in movies like Free Willy, whales have long captured the human imagination. And it makes sense—they're among the largest and most intelligent creatures to ever live on our planet. This time on Sidedoor, we’ll explore our surprising relationship with whales through the lens of one species: the gray whale. Once aggressively hunted and thought to be nearly extinct, they've rebounded to become one of the North Pacific’s most abundant whale species. So, what changed?

You know Amelia Earhart, but did you know she was just one of a daring group of women aviators who defied both expectations and gravity in the 1920s? They called themselves the Ninety-Nines, and they’re still flying today as an organization dedicated to the advancement of women pilots. This time on Sidedoor, we time-travel to the Roaring ‘20s to experience America's first official all-female air race, and then meet a modern-day Ninety-Nine who is ensuring that the legacy of Earhart and her fellow pilots continues to thrive.

Meet Eadweard Muybridge, a pioneering and eccentric photographer from the 1800s whose work changed how people understood movement, and paved the way for the invention of motion pictures. But this inventor, artist, and showman also made a name for himself for something much less savory: murder. This time on Sidedoor, come for the ingenuity and stay for the scandal as we find out how a near-death experience, a handsome horse, and a rumored $25,000 bet helped Eadweard Muybridge change the course of photographic history.