Lava hunter focuses on the work of photographer Bob Madden; Afghan warrior highlights the work of Reza Deghati; National Geographic top 10 photos features Chris Johns, editor-in-chief of National Geographic magazine, discussing the process by which he selects photographs for publication, and features the top ten photos of 2009.

Americans are subject to what may be the most extreme prison environment ever designed. Although the effects of isolation are largely unknown, in prisons across the country, convicts are placed in solitary confinement--cut off from nearly all human contact. Some say solitary is the only way to handle the worst prisoners, but others claim it amounts to psychological torture more cruel than any physical abuse. From prisoners on the edge, to scientists...

See how the loss of Arctic ice affects the survival skills of ringed seals, polar bears, and narwhals. For some, the ice is a way to hunt. For others, a way to keep from being hunted. These Arctic creatures have become masters at negotiating the perils of this frozen world. But, their dependence on the ice is also their greatest vulnerablility. These resourceful creatures are learning to adapt.

Presents a riveting account of the dramatic changes now occurring around the world due to climate change. Leonardo DiCaprio travels to five continents and the Arctic to witness climate change firsthand, going on expeditiions with scientists and meeting with political leaders. Also presents steps individuals and society can take to prevent the disruption of life on our planet.

History reports that the mighty Inca were swiftly wiped out by a small band of Conquistadors, but new evidence is being unearthed that may help rewrite history. Uncovered remains of those who died in battle along with recently discovered documents suggest that even after forming military alliances with thousands of Indian mercenaries, it took the Spanish many years to defeat the Inca Empire.

An intimate portrait of Malala Yousafzai, who was wounded when Taliban gunmen opened fire on her in Pakistan's Swat Valley. The shooting of the then fifteen-year-old teenager sparked international media outrage. An educational activist in Pakistan, Yousafzai has since emerged as a leading campaigner for the rights of children worldwide and in December 2014, became the youngest-ever Nobel Peace Prize Laureate.

As big a force as pterosaurs were in the history of life, they have largely remained a mystery to scientists. Now with the help of amazing special effects and engineering, learn about remarkable new discoveries that shed light on these creatures.