A diver entering a pitch black cave is silhouetted by sunlight filtering through the depths above. Image courtesy of Tamara Thomsen, Bermuda Deep Water Caves 2011 Exploration, NOAA-OER.
A diver entering a pitch black cave is silhouetted by sunlight filtering through the depths above. Image courtesy of Tamara Thomsen, Bermuda Deep Water Caves 2011 Exploration, NOAA-OER.
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