Aldi carts are lined up and chained together outside stores. When you insert a quarter, it unlocks the chain. When you return the quarter, it's returned. "Lend us a quarter and we'll lend you a cart," ...

Driving innovation in wind power, China recently unveiled this unique twin rotor floating wind turbine. Called Ocean X, one V-shaped structure can power 30,000 homes for three years. Chinese wind ...