Whatever is the mystery behind the UFOs and whoever these beings traveling in them  are, they are not going to accomplish much on planet earth. These creatures may be super intelligent but they are not immortal.Their space ships are not indestructible either.Probably they are trying to come and make planet earth their home. But the earth belongs to God ,Who made the heavens and the earth and the stars and all that.His plan is to come and dwell on earth with  mankind,His creation.Angels are far more superior beings than these aliens.When one Angel stepped down into the earth the earth was illuminated by his glory,the Bible says.Angels are immortal.and they don't even need a space craft to travel.So the aliens are not going to accomplish much on planet earth.To find out more about this please visit;   http://www.gilead.ws