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Life on Earth
S01 E05 / CONQUEST OF THE WATERS
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EP 01
THE INFINITE VARIETY
EP 02
BUILDING BODIES
EP 03
THE FIRST FORESTS
EP 04
THE SWARMING HORDES
EP 05
CONQUEST OF THE WATERS
EP 06
INVASION OF THE LAND
EP 07
VICTORS OF THE DRY LAND
EP 08
LORDS OF THE AIR
EP 09
THE RISE OF THE MAMMALS
EP 10
THEME AND VARIATIONS
EP 11
THE HUNTERS AND HUNTED
EP 12
LIFE IN THE TREES
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CONQUEST OF THE WATERSFish occur in populations of billions and there are over 30,000 species, more than in any other group of backboned animals. The development of the backbone was a crucial advance in evolution -and it probably came from a most unlikely source, a little jelly-like creature called a sea squirt.
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