It’s the immense distances of space that prevent us from finding other intelligent life. You must understand the distance to a habitable star system is a voyage that takes longer than the star system exists. The suns die out before you can get to them. there’s no way for these life forms to communicate with each other. You can send a message to a habitable planet but two problems arise: 1) the light you are seeing from this planet is millions of years old and that planet is no longer habitable, and 2) even if there was life on the planet when you sent the message, by the time the message arrives to the planet the intelligent life will not exist anymore.
The distances are the reason I don’t believe any little bug-eyed green or grey guys are visiting us.
But that doesn’t mean there aren’t explanations for all of the stories. I don’t believe they are all mistaken identification or hoax. People are seeing something for which we don’t have an explanation.
Some things burn and others dont due to their phlogiston content.
I have a very old medical book that suggests all kinds of cures that even the least educated today know are more dangerous than the disease like 2tsp of mercury is the best cure for syphilis.
My father told of listening to the radio when an expert on aeronautics said we could never break the sound barrier and gave a detailed explanation of why it was impossible.
Ulcers are caused by stress and Mexican food.
No one will ever need more than 2Mb of RAM.
Everything you know is wrong. We are just haughty monkeys convinced we know which rocks are the best to bang together and that kind of thought process insures that we stay that way.