Whether life exists elsewhere in our universe is a long standing mystery. But for some scientists, there’s another interesting question: could there be life in a universe significantly different from our own?
Science fiction has often explored other universes such as those of alternate history (where the South won the Civil War and not the North for example). Science fiction has also explored universes where the laws of physics are different. In this case scientists have explored this concept and have come up with some interesting extrapolations.