Wormholes could potentially exist; there is even a well-known non-crackpot theory called ER=EPR that roughly suggests entangled particles are connected by wormh

Wormholes could potentially exist; there is even a well-known non-crackpot theory called ER=EPR that roughly suggests entangled particles are connected by wormholes. What is fiction is wormholes you can send information or people though.