Proof of gravitational waves came on Sept. 14, 2015, when two giant, L-shaped, 2-mile-long laser instruments, one set up in a swamp in Louisiana and the other in Hanford, Washington, detected a tiny ...

There are two fundamental classes of theories required to describe the entirety of the Universe. On the one hand, there's quantum field theory, which describes electromagnetism and the nuclear forces, ...

Einstein desperately wanted a unified theory of physics. Thanks to gravitational waves—the poster child of general relativity—his wish might just come true. Gravitational waves are ripples in the ...