A Perfect Planet - First Season English Subtitles

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DAVID ATTENBOROUGH: 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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