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Two German machines will grind two miles under the rowhouses of West Baltimore, 150 feet below the street, and before either can start somebody has to buy the right to tunnel under 500 of those houses one at a time
Australia is pulling 12,900 tonnes of concrete and steel out of the River Derwent with a 280-tonne crawler crane and barges underneath to catch what falls, and the ship it is doing it for still sails 419 miles to refuel
An American startup wants to lower a 15-megawatt reactor a mile down a hole outside a Kansas town of 9,600 people, with the water above it doing the job of a containment dome, and the route it is on lets the government skip the environmental impact statement
A 1,609-pound underwater drone goes out over the Baltic floor with no cable on it, hunting mines laid in two world wars, and the magnets in its thrusters are matched to each other so it does not set off the fuze on the thing it is looking at