A new underwater research facility is making waves. Deep, a U.K. ocean engineering company, has installed a subsea human habitat almost 60 feet underwater in the Tennessee Reef, part of the Florida Keys National Marine Sanctuary. Called Vanguard, the habitat allows for four aquanauts to live in a dry environment underwater for five days without needing to resurface. And Vanguard is just the first of a proposed network of underwater habitats by the company.

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