More than a century before quantum mechanics was born, Irish mathematician William Rowan Hamilton stumbled onto an idea that would quietly foreshadow one of the deepest truths in physics. While ...

Abstract: In this paper, we propose a metal 3D printed double-ridged horn antenna with a truncated cone feeding structure, curve-shaped cavity, and mode suppressor for a feeder of a reflector antenna.

A puzzling striped signal coming from the Crab Pulsar has baffled astronomers for more than two decades. Now, a new theoretical model suggests the pattern emerges from a delicate cosmic tug-of-war ...