This leaves four-fifths - twice the area of Mars - still to be surveyed to a modern standard.
from BBC News - Home https://ift.tt/3elRNBl
السبت، 20 يونيو 2020
One-fifth of Earth's ocean floor is now mapped https://ift.tt/3elRNBl This leaves four-fifths - twice the area of Mars - still to be surveyed to a modern standard. https://ift.tt/eA8V8J June 21, 2020 at 01:14AM
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