5. The existence of other habitable planets
All this time we thought only Earth is the only planet that has all the requirements for life to really exist now didn’t we? Well, it’s time to start changing your perceptions. Apparently, there are tons of other planets out there that can and has been exhibiting earth like behavior. Yes, these planets are not part of our solar system aka the Milky Way Galaxy but there exist hundred other solar systems which contain their own set of planets and those planets contain all the essentials for life to fully grow.