Vast 99.999% of Earth’s Deep Seabed Still Unexplored

Swift Summary

• Less than 0.001% of Earth’s deep seafloor has been directly observed by humans, according to a new study analyzing deep-sea dives.
• Oceans constitute 71% of Earth’s surface, with around 93% classified as deep seafloor (depths exceeding 200 meters).
• Most deep-sea exploration has relied on indirect methods like satellite imaging or ship-mounted sonar rather than human observation through submersibles.

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