Science fiction movies, television shows and books often used wormholes to travel vast expanses of the universe. More recently it became known that spacecraft humans are capable of building would be crushed by the extreme gravity. With that change, different theories emerged challenging the way we look at space travel currently. It has been speculated since at least 1989, when Bob Lazar told the world that he had worked on extraterrestrial craft and that those vehicles traveled within a “Gravity Bubble”, that gravity could be manipulated for faster than light travel. This article from The Science News describes how scientists have finally theorized the nature of gravity from a quantum scale through the galactic scale and you can check it out HERE.