SEOUL, Oct. 31 (Yonhap) -- North Korea fired what appeared to be a new type of solid-fuel intercontinental ballistic missile (ICBM) toward the East Sea on Thursday, South Korea's military said ...

Traditional solid fuels, such as coal and biomass, continue to be widely used to meet daily cooking energy needs, with ...

Magdrive is working on three versions of its space thrusters, and because they run on solid metal, they might one day even be powered by space junk collected directly in orbit, turning it from threat ...

Some designs do not require solid fuel, which eliminates the need for manufacturing and disposing of it. In recent years, growing interest in this technology has led to renewed development activities.