David Attenborough shows how life on planet Earth flourishes as result of a perfect balance of a whole array of factors.
第 1 集
Volcano
Without volcanoes to build and fertilize land, Earth couldn't support life.
第 2 集
The Sun
How wildlife adapts for survival to the seasonal shifts in the sun's intensity, from wood frogs that can freeze and thaw to Arctic wolves that thrive in the chilly darkness.
第 3 集
Weather
A look at how the planet's limited fresh water is distributed around the globe thanks to storms, and how animals manage in the driest habitats on Earth.
第 4 集
Oceans
All marine life depends upon the constant motion of Earth's oceans.
第 5 集
Humans
A new dominant force now threatens our perfect planet. That force is us.
David Attenborough
Huw Cordey
Keith Scholey
Alastair Fothergill