Howard Nightingall

Although it crosses six countries and is over 3,500 kilometers long, the Zambezi is one of the least known rivers in the world. So it's time to take to the water and discover this mystical, ever-changing river, whose mood changes from day to day, kilometer to kilometer, and which is the very essence of life for millions of animals and people in this often drought-stricken, water-scarce region!

A New Yorker journeys to the jungle in the Darien Gap of Panama to reconnect with an indigenous tribe he met and photographed 20 years ago. Their reunion highlights the profound power of photos and the human connection that transcends cultural barriers.

It shows the Neretva river from its source to the shores of the Adriatic Sea. The document also captures the original four-hundred-year-old bridge in Mostar.

Many geneticists and archaeologists have long surmised that human life began in Africa. Dr. Spencer Wells, one of a group of scientists studying the origin of human life, offers evidence and theories to support such a thesis in this PBS special. He claims that Africa was populated by only a few thousand people that some deserted their homeland in a conquest that has resulted in global domination.

This documentary shows the characteristics and location of major plains and plateaus of North America, and discusses some of the ways in which they have affected man's use of the land.