WATCH NOW: Only 23.4% of the ocean floor has ever been mapped. But that number is changing FAST. Join Brian Greene ( @brian_greene111 ) Oceanographer Vicki Ferrini ( @drthevic ) Marine Biologist Helen Scales ( @drhelenscales ) and Explorer Victor Vescovo ( @caladanoceanic ) discuss the latest tools being used to discover THE DEEP. Live on YouTube Now! #ocean #oceanography #deepseadiver #oceanfloor #water #geography #submersible #submarine #marinebiology #mapping #cartography #DeepSea #deepsea #deepseamining #biodiversity #abyssal