Seven Worlds, One Planet - First Season English Subtitles

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200 million years ago,

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our planet looked very different
from what it does today.

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It was entirely covered by sea,

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which surrounded one single
supercontinent we call Pangaea.

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And then Pangaea began to break up.

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Life was cast adrift on fragments of land.

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And these fragments eventually
became our seven continents.

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We will see how life developed
on each continent,

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giving rise to the extraordinary
and wonderful diversity that we see today.

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Asia - the largest
of all the Earth's continents.

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It stretches from the equator
to beyond the Arctic Circle.

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This is a continent of extremes.

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Here, temperatures can drop
to below minus 60 degrees Celsius.

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On land, survival is almost impossible.

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But for a few weeks in summer,

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the ice melts
and the coast is transformed.

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This is one of the biggest gatherings
of mammals

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to be found anywhere on Earth.

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At the southern tip of South America,

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the Andes mountains rise
almost vertically.

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Their very height affects
life throughout the continent.

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The barren slopes look inhospitable.

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But like all parts of South America,
they're actually rich with wildlife.

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A family of puma.

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They live further south
than any other kind of cat on Earth.

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These cubs are only six months old -

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entirely dependent on their mother
for food.

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Australia -

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an island continent

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cast adrift
during the time of the dinosaurs.

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Isolated from the rest of life on land
for millions of years,

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the animals cast away here
are today like none elsewhere.

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This is a land of survivors.

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The jungles of northern Australia -
the oldest on our planet.

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Unchanged for 180 million years.

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The animals and plants here are armed...

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Europe.

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Home to 850 million people.

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This is a continent
that has been transformed by humanity.

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It is a crowded world.

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But not all of it.

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There are still precious areas
of wilderness

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and, living within them,
some very surprising animals.

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(SQUAWKING)

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Forest once covered 80% of Europe.

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One continent on our planet changes

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more dramatically than any other.

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(THUNDER RUMBLES)

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North America.

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Whole landscapes here can be transformed
in a matter of minutes.

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And all life has to be ready
to seize the moment.

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Getting it wrong can be disastrous.

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But time it correctly,
and there can be great rewards.

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This is a land of opportunity.

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Africa.

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No continent on Earth today has
such spectacular wildlife.

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At its heart lies
a vast tropical rainforest.

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Over a million square miles
of wilderness,

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much of it still unexplored...

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...even now.

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There are more species of animals
and plants in these jungles

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than anywhere else on the continent.

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But even in this land of plenty...