Why are you posting on this thread if you think that way? Are you here to disrupt the conversation? Ridicule people for what they know or believe? If this is so preposterous, why don't you find a use of your time that suits you better?
Actually, online, when I discuss the idea, across forums, about aliens, I ask the same thing.
Prove the amazing evidence for such an amazing thing.
That’s it. Period. It just does not happen.