https://www.cnet.com/news/wormhole-travel-could-be-real-but-would-also-be-really-slow/

"It takes longer to get through these wormholes than to go directly," Jafferis said, "so they are not very useful for space travel."

The discovery, presented by Jafferis on Saturday at the 2019 American Physical Society April Meeting in Denver, is really more about quantum mechanics than intergalactic travel. His theory states that two black holes connected at a quantum level can act as a wormhole through which light can travel. This means that light and information can be retrieved from a black hole.