Baffling symptoms. Controversial diagnoses. Costly treatments. Seven people with chronic illnesses search for answers — and relief.

As urban space shrinks, we build higher and faster than ever before, creating a new generation of skyscrapers. Super skyscrapers are pushing the limits of engineering, technology and design to become greener, stronger, smarter and more luxurious than their predecessors. This four-part series follows the creation of four extraordinary buildings, showcasing how they will revolutionize the way we live, work and protect ourselves from potential threats. Read more about each episode below.

National Geographic’s landmark event series, The Greeks, brings together historians, archaeologists, actors, athletes, scientists and artists to launch a groundbreaking exploration into the ancient Greeks’ journey – not just to better understand their past, but to discover how their legacy illuminates our present, and will shape our future. The story of the Greeks is the story of us.

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Fascinating insights in the day and night life of some of America’s most famed metropolises. Along with showcasing each city’s iconic landmarks and often-surprising history, the series’ 4K cameras capture a bird’s-eye perspective of the frenzy of work and play that make each city so distinctive.

This timely and provocative docu-series spotlights the crisis of the the opioid epidemic through the eyes of those most affected: the growers, addicts, cartel bosses and law enforcement hopelessly caught in its web.

This docuseries travels deep into the heart of the food supply chain to reveal unsavory truths and expose hidden forces that shape what we eat.

In an instant, life can change forever and that moment will define who you are. More than just a retelling of heart pounding first-person accounts of the world’s most harrowing tales of survival, these tales are brought to life with breathtaking dramatizations of the moment before and after life was forever changed.

Beneath the sunlit glamour of 1985 LA lurks a relentlessly evil serial killer. In this true-crime story, two detectives won’t rest until they catch him.

Uncovers the extraordinary truth behind some of the Mafia’s most notorious outlaws, and reveals how the FBI and law enforcement developed the techniques to crack the organization and bring it to justice. This is the story of the rise and fall of the Mafia, told by the people who brought it down.

Learn about the creation of some of the world’s most ambitious and technologically advanced buildings. From subaquatic homes to futuristic towers and pencil thin skyscrapers, see how these previously impossible structures are taking shape.

Follow the 300-day journey of BTS’s sold-out world tour, BTS Live Trilogy Episode III: The Wings Tour. Celebrate the triumph of their friendship as they overcome shared hardships, and witness the growth and hard work as BTS continues on the path to grow into fully-fledged artists.