At four billion years old, the ocean is nearly as ancient as the planet itself. Find out the story of its turbulent beginnings.

Faced with increased acidity, less oxygen and warming temperatures, what does the future hold for the planet's oceans?

With technological advances allowing scientists to go deeper and deeper beneath the waves, catch a glimpse of the deep-sea beasts lurking below.

Human activity has had a colossal impact on our coastlines. Can our ecosystems recover through careful marine protection plans?