Matter and antimatter should have destroyed each other in the moments after the Big Bang. That they didn’t is yet another enduring mystery of physics.
Scientists used telescopes to capture a gamma-ray burst as it happened.
Physicists capture and measure elusive antimatter for the first time
What happened after the Big Bang? If scientists are right, the answer lies in the ticking of primordial clocks.
The possibility of measuring gravity waves opens the door to a host of intriguing theories about the cosmos.
Einstein’s theory of relativity has survived over a hundred years, having been put to rigorous testing and come out unscathed. But recent conclusions on the accelerating expansion of the universe corroborate a further idea Einstein had posited–and rejected–nearly a century ago.