November 15, 2000 • 50m
The most striking feature of planet Earth is the existence of life, and the most striking feature of life is its richness and vari...Read more
November 22, 2000 • 50m
Extinction is a natural process, and five times in the history of life it has happened on a huge scale. The dinosaurs were wiped o...Read more
November 29, 2000 • 50m
How the human species treats the planet over the next one hundred years will determine the future of all life on Earth. We stand t...Read more