A full scale model of Raytheon's Lower Tier Air and Missile Defense Sensor, a next-generation radar that will defeat advanced threats like hypersonic weapons. (Photo courtesy of Raytheon) The U.S.
A large cloud of tiny fragments revolves around Earth following satellite explosions, rocket stage malfunctions, and ...
Researchers have developed a system, called ProxiCycle, that logs when a passing car comes too close to a cyclist (four feet or less). A small, inexpensive sensor plugs into bicycle handlebars and ...
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