We know the surface of Mars better than our own seafloor.

According to NOAA, more than 80% of the ocean has never been mapped in high resolution or directly observed. Mars and the Moon, by contrast, are fully mapped in fine detail. The reason: radar and cameras can't penetrate water, so the seafloor must be surveyed strip by strip with ships and sonar, which takes decades.

Useful: New species and undersea mountains are still found regularly, not just in science fiction.

Source: oceanservice.noaa.gov

ForschungOzeaneTiefsee

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