There are no aliens here.
Actually, Born again Christians are aliens to this world.
Jhn 8:23 - And he said unto them, Ye are from beneath; I am from above: ye are of this world; I am not of this world.
Jhn 18:36 - Jesus answered, My kingdom is not of this world: if my kingdom were of this world, then would my servants fight, that I should not be delivered to the Jews: but now is my kingdom not from hence.
Jhn 15:19 - If ye were of the world, the world would love his own: but because ye are not of the world, but I have chosen you out of the world, therefore the world hateth you.
Jhn 17:14 - I have given them thy word; and the world hath hated them, because they are not of the world, even as I am not of the world.
Jhn 17:16 - They are not of the world, even as I am not of the world.