The world’s largest emerald is unearthed in Brazil in 2001, sparking an epic tale of deceit, obsession, and folly.

BASE jumper Dean Potter has set his sights on Mount Bute - a 9,000-foot granite launch pad along the British Columbia coastline.. But first, he has to prepare his body and develop a new wing suit.

The Inside story of the most audacious heist in NASA’s history – how an intern stole Moon rocks from the Johnson Space Center.

Navigating a sea of lies and manipulation, animal rights activist Chris DeRose works with informants to bring both rural and inner city dog fighters to justice.

Busting into the Business After multiple fruitless attempts to interview the escort services Mariana decideds to go undercover.

Documenting the development of NASA's Mars rover Curiosity at the Jet Propulsion Laboratory in Pasadena, Cal., and the November 26, 2011, launch of the craft, which is scheduled to land on the Red Planet in August 2012.

On May 22, 2011, an EF-5 tornado struck Joplin, Missouri, a city of 50,000 in the southwest corner of the state. Packing winds of more than 200 miles an hour, the tornado tore through the center of the city, tearing off two floors of the city's main hospital, demolishing churches and businesses, and rendering whole neighborhoods unrecognizable. More than 150 people lost their lives in the storm, and the devastation to the city was enormous. http://channel.nationalgeographic.com/channel/episodes/joplin-tornado/