This leaves four-fifths – twice the area of Mars – still to be surveyed to a modern standard.
Click here for original story, One-fifth of Earth’s ocean floor is now mapped
Source: BBC News – Science & Environment
This leaves four-fifths – twice the area of Mars – still to be surveyed to a modern standard.
Click here for original story, One-fifth of Earth’s ocean floor is now mapped
Source: BBC News – Science & Environment