The biosphere is the global sum of all ecosystems. It can also be called the zone of life on Earth. From the broadest biophysiological point of view, the biosphere is the global ecological system integrating all living beings and their relationships, including their interaction with the elements of the lithosphere, hydrosphere and atmosphere. The biosphere is postulated to have evolved, beginning through a process of biogenesis or biopoesis, at least some 3.5 billion years ago

This interactive DVD with added questions and quizzes discusses how the biosphere came to be and provides a clear picture of scientific concepts needed to understand the biosphere today.

*Subtitled