A black hole can be a wormhole, but we’ll never know
Time travel is an age-old idea many people fantasize about, and many scientists have tried to theorize the possibility. Besides in movies, it has been brought before science. Einstein’s theory of general relativity can mathematically predict the possibility of wormholes like rips in time that allow people to time travel or travel through universes. However, there has been no proof to support it.
According to these theories, black holes can also be wormholes. The core of its functions and features would be the same, but the difference is how it affects the light that goes through it. It’s impossible to differentiate a wormhole from a black hole from the outside. So if there is a brave soul out there who wants to let us know, be our guest.