Now, JWST may have revealed evidence that our entire universe exists inside the event horizon of a black hole inside a larger ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Astronomers using ...

Studies suggest they were accelerated by Sagittarius A*, the supermassive black hole at the center of the galaxy. But at least 21 hypervelocity stars detected are consistent with being ejected by ...