28:56
Physical Geography: Making Sense of Planet Earth - Human Impacts on the Natural Environment
About this title: Human beings have become a geographical force. In the 21st century human beings each year bring more change to the surface of the planet than all the natural forces combined. In this final program Alec Murphy presents an intriguing...
51:40
The ascent of man: the harvest of the seasons
This is part two of a history of the cultural evolution of man, from primitive times to the present, presented by the late Dr. Jacob Bronowski. This program begins with the long spring that came after the ice ages, when man discovered agriculture an...