By Ajay Kumar

• From time to time Oceanographers have confirmed that we humans know so much about the Moon and Mars but we lack information of about 70 percent of our own planet, Earth.
• The reason being that around 70 percent of Earth is covered by water, most of which go deep up to 200 meters.
• There have been many ideas which were proposed to map the ocean floors. the latest comes from Japan. What is it- watch in the video: