Our planet is as old as Mars, Venus and Mercury.
Yet only the Earth has life.
Writer Gabrielle Walker looks at newly discovered evidence that this planet was almost made for life.
Science writer Gabrielle Walker looks at the oldest remnants of the planet's surface and examines the conditions which prevailed when life on Earth began.
Science writer Gabrielle Walker finds evidence that Earth was not a barren wasteland but a world adapted by the first living organisms as they fashioned their environment.
Life on this planet was no accident: everything about the geology of the Earth suggests it was made for life.
In this series Gabrielle Walker charts the rise of mankind's ancestors from simple slime to the complex organisms we see all around us today.
Along the way she uncovers tales of mass poisoning, sex, death and even global catastrophe in this history of the early Earth.
In the second programme of the series exploring the evolution of life on Earth, Gabrielle Walker uncovers the story of the greatest mass poisoning in history: a burst of oxygen into the Earth's atmosphere.
Was it this event that shocked our microbial ancestors into a more vigorous way of life?
Then Cafe Africa
A barman in Zambia chews the fat.
In the final programme of the series exploring the evolution of life on Earth, Gabrielle Walker discovers how sex, death and even armed warfare allowed simple slime to develop into the complex animals we see around us today.