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Oceans are explored to better understand the world beneath the waves.

A groundbreaking journey to the deepest parts of the oceans.

The ingenious ways life exists in the undersea cities of tropical reefs.

Animals go to the extreme to survive in the vast marine desert.

Animals fight for space and food in a seasonal world of boom and bust.

Coasts are the most changeable, but they offer great riches.

Scientists reveal what the future holds for our oceans.