Quantum electrodynamics (QED) theory describes the way light and matter interact. It includes both quantum mechanics and Einstein’s particular theory of relativity in a way that has remained successf… [+2936 chars]
Apr 8 2022Reviewed by Alex Smith Gravitational waves are a chaotic sea of ripples in space-time that make up the universe. Astronomers have been hoping to witness waves from circling pairs of superm… [+5062 chars]
