Mapping the Oceans' Floors by 2030

Oceanographers often say we know much more about the surface of the Moon and Mars than we do about nearly 70 percent of our own planet. That is because most of the Earth is covered in water, most of it deeper than 200 meters. There are several initiatives to map the oceans' floors and the latest comes from Japan. VOA's George Putic reports.

© La Voix de l'Amérique - jeudi 24 mai 2018