NOVA: Australia's First 4 Billion Years

Hidden in the red hills of Australia are clues to the mysteries of Earth's birth, how life arose and how it transformed the planet into the world we now live in.

How did life storm the beaches and dominate planet Earth?

Host Richard Smith comes face-to-face with the previously unknown reptilian rulers of prehistoric Australia.

After the asteroid impact 65 million years ago -- believed to have wiped out the dinosaurs -- Australia was set adrift on a lonely voyage in southern seas.