Beneath the waters of Japan’s southern Yonaguni Island lies a mysterious structure that has baffled researchers since its ...

Using an underwater robot launched from the research vessel Nautilus, an underwater volcano in American Samoa was explored. Ocean Exploration Trust Off the coast of American Samoa, an active ...

Examples of natural formations resembling artificial structures can be found worldwide. The Bimini Road, an underwater rock formation in the Bahamas, and the Giant’s Causeway in Northern Ireland both ...