A Perfect Planet - First Season English Subtitles

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A Perfect Planet.

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There is only one planet
in the universe, as far as we know,

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where there is life.

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The Earth.

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Our home.

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The perfect planet.

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Life here is only possible

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because of a unique balance
of natural forces.

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Energy from the sun
powers the living world.

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A Perfect Planet.

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There is a nuclear reactor
93 million miles away.

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We call it the sun.

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Its rays, travelling through space,

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reach the Earth in just eight minutes...

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...and give power to life

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throughout the planet.

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Its daily and yearly rhythms

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shape the existence of every creature
on Earth...

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A Perfect Planet.

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We live in a world
with a violent atmosphere.

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Rain clouds form, and powerful winds
carry their fresh water around the globe.

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Without this, our perfect planet
simply couldn't function...

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...for all life on land
depends on the weather.

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We all know that the weather
can change on a daily, even hourly, basis.

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But annual weather patterns
have been stable for millennia...

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...and it's this reliability
on which life depends.

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A Perfect Planet.

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All life in the oceans depends
on the continuous movement of water.

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There are not five separate oceans
on Earth,

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but just one...

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...whose parts are linked by
powerful, unceasing currents.

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Every drop of seawater on Earth
rides these currents,

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taking a thousand years
to complete a single circuit.

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And where there are currents...

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...there is life.

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A Perfect Planet.

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Life flourishes on planet Earth...

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...thanks to powerful natural forces.

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The weather gives us
predictable patterns of rainfall.

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Sunlight delivers energy
to all parts of planet Earth's surface.

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Ocean currents carry nutrients
around the globe.

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Volcanoes create and fertilise the land.

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Together, these forces
have helped shape our living planet.

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But it's a fragile system.