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Deep-sea researchers were surveying an ocean ridge off the coast of Hawaii in 2015 and amid ordinary ocean floor fare - a bit of coral, some volcanic rock - they came across something surprising. During the moment caught on camera, the brain-like curves of a sponge about the size of a minivan came into view. Now, a new study reports that it is the largest sponge ever documented, at about 11.5 feet long, more than 6.5 feet wide and 4.9 feet high. [Source: National Public Radio]
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