For decades, the four known forces of nature, gravity, electromagnetism, and the strong and weak nuclear forces, have ...

A little more than a century ago, the US Army Air Service came up with a scheme for naming the military’s multiplying fleet of airplanes. The 1924 aircraft designation code produced memorable names ...

Traditional magnetic separators, however, present a challenge: they generate a magnetic force that is very high near the side of the vessel closest to the magnet and decreases rapidly with distance.

Scientists are exploring the possibility of a "fifth force" beyond the four known fundamental forces. This hypothetical force ...