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Researchers collected more than 43,000 records of dives and assessed the photos and videos to determine how much of the bottom has been seen by humans.

Humans have visually documented about 1,470 square miles, or a mere 0.001 percent, of the deep seafloor, according to a new study. That’s a little larger than the size of Rhode Island.

The report, published Wednesday in the journal Science Advances, arrives as nations debate whether to pursue industrial mining of the seabed for critical minerals.

Some scientists argue that so little is known about the undersea world that more research on the deep seafloor is needed to responsibly move forward with extractive activities.

“More information is always beneficial, so we can make more informed and better decisions,” said Katy Croff Bell, a deep ocean explorer who led the study and is the founder of the Ocean Discovery League, a nonprofit group that promotes seafloor exploration.

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