Black hole GW190521 may be a wormhole from another universe
For just one-tenth of a second in May 2019, the universe delivered a signal that did not fit…
The Seven-Hour Mass Explosion That Broke the Rules of the Universe
GRB 250702B emerged from the top edge of its host galaxy’s dark dust lane (see inset). Credit: NASA,…
Intermediate-Mass Black Hole Caught Eating Star in NGC 6099
The newly-discovered intermediate-mass black hole, named NGC 6099 HLX-1, resides in a compact star cluster on the outskirts…