A new transmission device that uses magnetic levitation to almost completely eliminate friction and wear has been developed as part of the MAGDRIVE research project, a collaboration of seven European ...

An internal gear hub provides multiple gears on a bicycle in an enclosed unit housed within the rear hub. Almost all bikes with gears now feature a derailleur system. But for a long time, internal ...

The Freedom-variant littoral combat ships Sioux City, Wichita and Billings participate in a maritime training exercise in the Caribbean Sea on July 4, 2021. (MC3 Austin Collins/U.S. Navy) WASHINGTON — ...