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America is building seabed batteries that charge drone submarines and keep throwing off heat for 28.8 years without a cable or a support ship, fuelled by a generator the Energy Department has had in a store at Oak Ridge
A German machine named Chessie was 700 feet under the Chesapeake when pieces of an English ship’s anchor started coming back on the conveyor, and crews had to swap 389 cutting tools by hand at the face, 150 pounds each, under the floor of the bay
A crane set a 2.2-million-pound module five storeys tall into a Georgia reactor in a single lift, and America is now planning as many as 91 more of those reactors, held up not by cranes or concrete but by the few people qualified to sign the paperwork
A 56-foot drone boat gets named in Plymouth on Wednesday with a 20-foot shipping-container slot cut into the middle of it, rated to four tonnes and wired with 30 kilowatts of its own power, and nobody will say what goes in the hole