We know surprisingly little about Earth’s deep seafloor – only a small percentage has been mapped in detail. There are better maps of the Moon’s surface than of the bottom of Earth’s ocean.
Ships with sonar can trace depth with great…
We know surprisingly little about Earth’s deep seafloor – only a small percentage has been mapped in detail. There are better maps of the Moon’s surface than of the bottom of Earth’s ocean.
Ships with sonar can trace depth with great…
