A deceptively simple question....
The series starts by answering a question: ‘What is the ocean?’
We know it’s big, salty and wet but how did it get so big, why is it salty and why is it so important to life on earth? And what do we know about how these three things made the ocean the perfect place for the beginning of life itself? We meet the scientists studying the conditions in deep sea hydrothermal vents to find out where and how it all began.