A young New York University student was thrown to the ground and attacked in a random broad daylight assault as she walked to class. Amelia Lewis, 20, was walking down Broadway in Manhattan on Monday ...

A laser is usually constructed from two basic elements: a material that provides optical gain through stimulated emission and an optical cavity that partially traps the light. When the total gain in ...

U.S. President Donald Trump threatened on Friday to come to the aid of protesters in Iran if security forces fired on them, days into unrest that has left several dead and posed the biggest internal ...