is building giant ships that travel through the seas more efficiently by squirting tiny air bubbles to “lubricate” the interface between the water and the hull. They claim efficiency improvements of 25% – saving far more energy than it takes to compress air for the bubbles.
This is what happens when you challenge engineers with tough problems: they come up with answers, and not necessarily what you'd expect. This team was challenged to make ships more efficient. They didn't take any of the obvious traditional approaches (change the hull shape, change the propulsion system, etc.). I'd love to know what piece of insight led to the idea of making the ship ride on a blanket of compressed air bubbles!