April 26 (UPI) --Scientists have credited comets and asteroids with delivering water and other elements necessary for life to Earth shortly after the planet was formed. But impact models suggest water ...

On August 10, North Korea conducted its sixth missile test as the United States and South Korea began their long-planned, yet much scaled-down, joint military exercises. In response to the drills, ...

A new round of intercept tests of railgun-fired hypersonic projectiles against airborne targets will take place in 2021 under a new U.S. Army contract award to General Atomics Electromagnetic Systems ...