Oceans are like the inky vastness of space, primordial and boundless. Unbroken, unchanging for miles upon thousands of miles, yet in constant flux, they represent so much that we don’t know about our own world. How did those old seafarers gaze upon these waters and find the courage to venture out into the untamed, wide open seas? Even today, only a fifth of the oceans have been charted. What else could lie in the depths, we still don’t know.