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For many practical applications involving lasers, it's important to be able to control the direction of the laser beams. Just ask Han Solo, or the captain of the Death Star. Researchers from North Carolina State University have come up with a very energy-efficient way of steering laser beams that is precise and relatively inexpensive.

A radically new approach to the design of batteries, developed by researchers at MIT, could provide a lightweight and inexpensive alternative to existing batteries for electric vehicles and the power grid. The technology could even make "refueling" such batteries as quick and easy as pumping gas into a conventional car.