All of the Earth's ocean, from the equator to the poles, is a single engine powered by sunlight - a Blue Machine.

Join Helen as she dives deep to illuminate the murky depths of the ocean engine, examining the messengers, passengers and voyagers that live in it, travel over it, and survive because of it. From the ancient Polynesians who navigated the Pacific by reading the waves to permanent residents of the deep such as the Greenland shark that can live for hundreds of years, she explains the vast currents, invisible ocean walls and underwater waterfalls that all have their place in the ocean's complex, interlinked system.

Venue: The Grand Central, Brighton. 7pm