In 2019, LIGO and Virgo recorded something truly bizarre – a gravitational wave event less than a tenth of a second in duration. Compared to the drawn-out chirps of black hole binaries on decaying orbital spirals, it was a sharp crack. The best explanation of the event, named GW190521, was a chance encounter of two black holes snaring each other …
Read More »Unusual Gravitational Wave May Be Sign of Wormhole Linking Universes : ScienceAlert
