Robert Zakin

North Korea embraces cyber-crime for profit and disruption with a 6,000 strong army of cyber criminals worldwide.

The dog is the ultimate human creation. With 400 breeds and counting, the dog is more varied in size and behavior than any other species on the planet. National Geographic looks at man's evolutionary manipulation of dogs' appearance, talents and temperament - and the accelerating efforts to create breeds to suit our needs (more than 80 percent of today's breeds did not exist 150 years ago). From desirable traits like supersensitive hearing and smell to the unintended consequences of genetic diseases, learn how nature and man have partnered to deliberately create new and specialized versions of man's best friend.

Correspondent Lisa Ling manages to penetrate its border by travelling undercover, pretending to work with a Nepalese eye surgeon on a humanitarian mission. Lisa’s time in North Korea offers a rare glimpse of everyday life in the country and some of the issues its people face.

In Northern California's Emerald Triangle, more than two thirds of the population are employed, in one way or another, by the marijuana business. Meet the rabbi aiming to open Washington DC’s first medical marijuana dispensary. As we follow the players and the pot into this brave new world, examine the myths and the science behind cannabis' purported medicinal properties. Is it worthless, a cure-all, or somewhere in between?

North Korea embraces cyber-crime for profit and disruption with a 6,000 strong army of cyber criminals worldwide.

North Korea embraces cyber-crime for profit and disruption with a 6,000 strong army of cyber criminals worldwide.

The dog is the ultimate human creation. With 400 breeds and counting, the dog is more varied in size and behavior than any other species on the planet. National Geographic looks at man's evolutionary manipulation of dogs' appearance, talents and temperament - and the accelerating efforts to create breeds to suit our needs (more than 80 percent of today's breeds did not exist 150 years ago). From desirable traits like supersensitive hearing and smell to the unintended consequences of genetic diseases, learn how nature and man have partnered to deliberately create new and specialized versions of man's best friend.

Correspondent Lisa Ling manages to penetrate its border by travelling undercover, pretending to work with a Nepalese eye surgeon on a humanitarian mission. Lisa’s time in North Korea offers a rare glimpse of everyday life in the country and some of the issues its people face.

Correspondent Lisa Ling manages to penetrate its border by travelling undercover, pretending to work with a Nepalese eye surgeon on a humanitarian mission. Lisa’s time in North Korea offers a rare glimpse of everyday life in the country and some of the issues its people face.

Correspondent Lisa Ling manages to penetrate its border by travelling undercover, pretending to work with a Nepalese eye surgeon on a humanitarian mission. Lisa’s time in North Korea offers a rare glimpse of everyday life in the country and some of the issues its people face.

In Northern California's Emerald Triangle, more than two thirds of the population are employed, in one way or another, by the marijuana business. Meet the rabbi aiming to open Washington DC’s first medical marijuana dispensary. As we follow the players and the pot into this brave new world, examine the myths and the science behind cannabis' purported medicinal properties. Is it worthless, a cure-all, or somewhere in between?