Alien Life On Earth?

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johnw
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Alien Life On Earth?

Millions of people believe earth has been visited or is currently inhabited by alien life......personally I think that any civilization that has conquered time and space travel would find humans about as interesting as an ant farm......but this article is interesting......https://www.morningticker.com/2018/01/new-alien-discovery-stuns-scientists
Stephan Hawking believes that contact with alien life might be cataclysmic for the human race......one sci-fi writer wrote,searching outer space and sending ourt signals maybe like advertising “Eat At Joe’s”....Happy New Year ,the truth is out there..........

Watcher
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Two thoughts:

Two thoughts:

1. The great science author Isaac Asimov postulated that there is almost zero chance aliens have visited earth. He said that for an alien to want to travel bazillions of miles (light years) to go someplace, they must choose the destination. Just as we do with business and vacation trips, we pick the places we go for reasons of interest, need, etc. Asimov said there is absolutely nothing outstanding about earth. We are a small, insignificant orb among trillions. Our radio and electromagnetic signals are puny and indistinguishable from everything else out there. The earth simply has not an iota of characteristics which would bring it to the attention of the aliens...except Mexico, I guess.

2. The Twilight Zone TV program had an episode about a visit to the earth by aliens. Their stated reason was "To Serve Man". Purely altruistic, doncha know. This clip is from that episode.

To Serve Man

pmconusa
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Animal life cannot exist

Animal life cannot exist without oxygen, water and food. Without oxygen, life ends in minutes. Without water, life ends in hours and without food, several days. If animal life is traveling from far away planets it would have to carry all of these items in quantities to last for the time it will take to get from where they started to earth and since we have determined there is no animal life within several light years from earth, if there is animal life on other planets than can support it, it will never be able to get here.

Efforts to colonize even the moon are doomed to failure for the very reasons cited and it is folly to pursue it.

Flash Gordon, the Captain Kirk of my generation was created and continued on the basis that all of the requirements for life could be created from nothing, just like people believe the universe was created by GOD from nothing. The reality is quite different.

johnw
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Watcher Asimov’s classic ,The

Watcher Asimov’s classic ,The Foundation trilogy based on the idea of a galactic empire that was so expansive the there were colonized planets on the periphery that had lost all contact and memory of the empire..... pmconusa....one of the interesting points in the article was that over the course of hundreds of millions of years of evolutionary progress it is hard to speculate what ailien technology might be capable of......
I like the idea that humankind isn’t the center of God’s creation.....that would be sad.

Ugenetoo
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One only need visit Walmart

One only need visit Walmart on a Tuesday just after the EBT cards are filled to realize that not only have aliens visited this planet, but have, in fact, interbred with the local flora and fauna.

Toolsmith
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Colonizing Mars or the Moon

Colonizing Mars or the Moon requires growing food there. Extracting water from hydrated rocks is also possible, and extracting oxygen and other gases from rock is also possible. Our nuclear subs create their own oxygen from water. A nuclear reactor on the surface is the only practical way to do any of that. Transporting supplies or fuel there just wouldn't work.

Now, what activity on Mars or the Moon could support that kind of costly effort? Unless the colony itself becomes the reason...

Or perhaps rich Earth tourists?

Melvin Udall
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Who are we to say that there

Who are we to say that there isn't some other "system", well beyond our bounds of understanding, that does not obey our scientific laws and understanding, but those of another sort, which can support a life form that is foreign to ours?

Do we really presume to know what is possible and not possible in the entire universe?

Toolsmith
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Given the poor record of

Given the poor record of forecasting what is possible here (food production, and other doomsday predictions) why do we take claims of impossibility seriously?

Sci-Fi writers have already proposed the idea that interstellar travel would have to include everything that a planetary colony would need. It would have to be nuclear powered (possibly fusion but at least fission since there would be no solar in interstellar voids), would need to grow all its own food, and recycle water and air (also involving the food plants).
A huge undertaking, but essentially similar to a lunar colony. Hijacking an asteroid or comet, chosen to provide the necessary resources, is one possible option.

Bruce Libby
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Mel

Mel
The we I am not sure of, but I can think of one who does.

johnw
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A few generations ago we were

A few generations ago we were grubbing an existence out behind a horse or an oxen,counting on water power to grind our corn and wheat and bashing each other over the heads with cudgels, swords and spears......Travel to the stars is not out of our reach...... who knows maybe they are reverse engineering stuff at area fifty one.....I still am in wonder at the computer chip......

Watcher
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Asimov's position is not that

Asimov's position is not that inter-steller travel is not possible. He contends that there is no reason for anyone to choose earth to visit. It is like a grain of sand on a beach...if you were to pick one grain to spend your money and energies to study, it has to stand out from all the other grains...which earth does not.

Toolsmith
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I think our constant

I think our constant electronic emissions may eventually attract attention. We'll be gone by the time it arrives, so it figures to be archaeologists...

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