During the Depression-era of the 1930s, tens of thousands of teenagers hopped freight trains in search of a better life elsewhere. What they discovered was a mixture of adventure, camaraderie, hardship and loneliness. They saw a country in turmoil and found experiences that impacted them for the rest of their lives -- their ultimate freedom traded for despair, lack of jobs, and even death. Through first-hand accounts, "The American Experience" recalls...

This inspiring World War II story spotlights 450 men who fought on two fronts at once. Black American aviators, known as the Tuskegee Airmen, battled Axis powers in Europe and North Africa and then took on racism at home. Trained by the segregated military system as an experiment to see if blacks could fly in combat, these pilots made more than 15,000 sorties and 1,500 missions. Their success led to the integration of the U.S. armed forces.

The amazing untold story of the radical underground radio station WBCN-FM set against the profound social, political and cultural changes of the late-1960s and early-70s, using the actual sights, sounds and stories of those who connected through the station, exploding music and countercultural scenes, militant anti-war and civil rights protests and emerging women's and LGBTQ-liberation movements.

He has been portrayed in countless movies and television shows by some of Hollywood's greatest actors, including Henry Fonda, Jimmy Stewart and, more recently, Kevin Costner, but these popular fictions belie the complexities and flaws of a man whose life is a lens on politics, justice and economic opportunity on the American frontier. As a young man, Wyatt Earp was a caricature of the Western lawman, spending his days drinking in saloons, gambling,...

The Catholic Church uses all of its might to try to silence Luther, including accusations of heresy and excommunication. Protected by his local ruler, Frederick the Wise, Luther continues to write radical critiques of the Church. In the process, he develops a new system of faith that places the freedom of the individual believer above the rituals of the Church. Aided by the newly invented printing press, his ideas spread rapidly. He is called before...

With some 40 species of shark calling Hawaii's waters home, scientists are seeing new animal behavior around every corner. Hopping from island to island, uncover surprising moments of cooperation, rarely seen hunting tactics and striking insights into these predators. Meet the Whitetip reef shark, Whale shark, Tiger shark and more through the lens of remote sensor cameras and drone technology.

If oceans continue to warm at the current pace, coral reefs could be wiped out by the end of the century. But scientists from around the globe are rushing to help corals adapt to a changing climate through assisted evolution. Follow scientists as they attempt to crossbreed heat-resistant corals, and even transplant corals' algae, in a race to save the coral reefs from extinction.