So, let's play the game a bit and see if any types of possible `logics' might be applied to `aliens' (obviously here on Earth) and logic.
Well, my first suggestion would be to look at my post - `Aliens and Entities Objectified Are There Four Types?' http://theheavystuff.com/?p=100 from my blog The Heavy Stuff as it isn't quite as `simple' a question as `Are There Aliens?'
So, let's restrict those `aliens' to JUST one of the types - phenomenological aliens that only got to Earth by traveling in a space-craft.
First, Earth has only been a cool place to `visit' for about the last 500 million years (with a solid surface etc) or so - or about the last 4% of time since the BB (big bang) (500million/13.6billion) .
Suddenly, that's not much of a time window, is it?
Suddenly, that's not much of a time window, is it?
Now, the positive is that NOBODY was visiting ANYWHERE in the first part of the Universes run after the BB - as there were no second generation stars to produce the needed elements for life to exist. Just in about the universes last 1/2 of its `life' has any visiting been going on anywhere - that is IF life and intelligence developed at all at the first opportunities. Then again, as you know, there wasn't even our Earth at this junction - simply the stardust that might form the star that blew up --- that then after a couple billion years of gravity action - became Our Sun.
Now, all that said, to intelligences that were going out into the universe in the last 500 million years, - and who are in THE MILKY WAY - our little blue aquatic harbor here might indeed look like a pretty compelling of a place to visit. Right? Logic might suggest that sometime in the previous 500 million years - some intelligences came to our lovely Planet.
What then? Did they stay and populate? (And what kind of spaceship size would be needed have a sufficient number of crew on board to do such an endeavor?) Go off looking for the next EARTH (or whatever their planet was named)?
None of the above seems VERY logical to me - possible but not logical.
The logical idea to me - would be that such `aliens' who `live' on space-craft exploring the universe at a speed below `light speed' - would almost certainly be NON-Biological IMO. That said, give a mechanical intelligence on a ship a couple billion years - and who knows what `types' of `entities' could be `developed' for such a craft. (Such as `conscious' orbs?)
Obviously one would think that such crafts abilities would involve the fullest extent of what the human brain is imagining that Nano technology will be able to do. Right? Remember, this craft and internal intelligence has been cruising for BILLIONS of years potentially and would have been launched, obviously, by some `humans' more advanced than us.
The logical idea to me - would be that such `aliens' who `live' on space-craft exploring the universe at a speed below `light speed' - would almost certainly be NON-Biological IMO. That said, give a mechanical intelligence on a ship a couple billion years - and who knows what `types' of `entities' could be `developed' for such a craft. (Such as `conscious' orbs?)
Obviously one would think that such crafts abilities would involve the fullest extent of what the human brain is imagining that Nano technology will be able to do. Right? Remember, this craft and internal intelligence has been cruising for BILLIONS of years potentially and would have been launched, obviously, by some `humans' more advanced than us.
Entities, that look like us (humans) or not would probably not be so hard to `do' - manufacture - on such a craft. (Especially with a bit of DNA?) One almost has to imagine the `alien-craft' inside to be of a unique design to be perpetual self-sustaining and creating `entities' of extremely long durability or with no-death as a characteristic.
I can easily imagine our own mankind in the distant future sending out an `intelligence machine' designed to roam the universe and create images of ourselves in some manner to communicate what we feel is our knowledge. To me, it really makes a lot more sense than biological beings endlessly exposed to space hazards - and ground based hazards. And, yes, as we know - the machines could self-replicate - building a new `them' out of the raw materials encountered across the universe when needed.
Now all that said, (and as you can guess, I'm not a big logic proponent of biological aliens in space craft) - it is of course possible that some alien race made it to Earth in the distant past - and eventually set up in our oceans or underground in some far removed location - with to me only the ocean having a possible chance of being true. (The idea of aliens here and living on Earth for decades if not eons.)
Then again, perhaps such biological aliens in crafts have happened by in the last half century or so by chance or by observing our own advancements - and have decided to set up shop in our local solar system for a bit of time - and somehow, that/this idea makes more logic to me than all I argued above.
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A Google Head Jest
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OVER 40 Links To UFO's (Video And Pictures)