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Explore how four-limbed animals became the blueprint for nature’s most versatile design and the unique designs that make up Earth.

On “Samhain: The Birth of Halloween,” Michael Londra embarks on a spine-tingling journey through Ireland to reveal how the holiday began.

On “Horizonte,” untreated HIV continues to be an issue in LGBTQ+ Latino communities because of the cultural stigma and barriers they face.

Jimmy Webb takes center stage to perform his catalog, sharing intimate stories behind the songs and their journeys to iconic status.

On “Energy Switch,” we’ll discuss solutions and barriers to nuclear energy with Dr. Sama Bilbao y León and Dr. Adam Stein

What can history teach us about leadership? Based on More Perfect’s In Pursuit, Retro Report explores leadership lessons.

On “Breaking the Deadloc,” as AI becomes woven into daily life, Americans face a choice: control the technology, or be controlled by it.

In season 2, Pati Jinich continues her journey inspired by the Pan-American Highway through the Western United States.

“Frontline” reports on the Haiti deportation crisis as hundreds of thousands of Haitians who fled to the U.S. return to their country.

On “Professor T,” Jasper and Helena test their spark at a spa, but a death rekindles his instincts and threatens their new romance.