Scientists prove the existence of parallel universes.


You mean if we have an evil dopplelanger? Check out the Star Trek Universe or Invasion of the Body Snatchers Movies?
 

Right now it is, but who knows what lies in the future and besides it's not that important for us in the grand scheme of things our focus for now is managening our resouces and figuring out how to avoid gammar ray, super nova and debri from the solar sysem from striking us out of exsistanc!