When two wormholes collide, they could produce ripples in space-time that ricochet off themselves. Future instruments could detect these gravitational “echoes,” providing evidence that these hypothetical tunnels through space-time actually exist, a new paper suggests.
The Laser Interferometer Gravitational-Wave Observatory (LIGO) has already detected space-time ripples, called gravitational waves, emanating from merging black holes — discoveries that led to the Nobel Prize in 2017.
But while LIGO’s detection was just one of many observations supporting the existence of black holes, these exotic objects still pose theoretical problems. For instance, they seem to be inconsistent with the laws of quantum mechanics. One way to resolve these problems is if black holes were actually wormholes.