Parallel Universe according to Islamic view

Parallel world or Parallel Universe exist? How is the Parallel Universe according to the Islamic view based on the instructions of the Qur’an?. Let’s say one day we find an extraterrestrial knocking on our atmosphere. Without a doubt, this would shock the world. But will the existence of these aliens merely serve to shake the core foundation of all world religions? Will the religion revealed by Allah only stop as meaningless information that there is another intelligent life in  the universe ?