What happens if Aliens arrive?

[IAstroViz]

Now this question needs an answer!

 

Now imagine yourself as a rock, and there are three options that might or might not happen.

 

1. You either get picked up by someone and get thrown into the river.

2. You either get picked up and that someone keeps it.

3. You either get completely ignored and is left alone till another someone shows up.

 

That someone is an alien or in this case not human... This is possible that there might be 'advanced' alien life somewhere in this universe that is very big.

 

The word universe is latin for: Uni - Infinite, Verse - World

 

Let's wait it out!

 

[Spyman]

Can you extend a little more on what you think can happen if they come to Earth, instead of your hard to relate analogy about a rock?

 

I can understand that no.3 is that they leave us alone or totally ignore us. But is no.1 that they take us to a better place or that they destroy us and is no.2 that they enslave us/take our stuff or that they invite us to join a galaxy federation or similar?

 

Also who are they, how can they find us and why would they come here?

Edited April 29, 2015 by Spyman

[IAstroViz]

Well, haven't we been experimenting a bit with radio waves and sending random pieces of information into space for no obsolute reason... Either they find this offensive or they find it like a love letter. And the chances are that 'advanced life' exists is highly possible. Am I correct that we are made out of 'space-stuff' so Hydrogen fuses to Carbon, blah, blah, blah... They can be made out of the same stuff that we are made from and have the elements to build an 'advanced' piece of technology. This can be possible by the Drake equation:

 

[imatfaal]

!

Moderator Note

 

Moved to lounge as there is no valid factual basis for argument

 

 

And 'universe' comes from the LATIN unus - one and vertere - to turn. All turned into one - everything treated as a singular object

[IAstroViz]

oops...

[Externet]

About the title of your post, there is some opinions written by -let's say- respectable people, that you may want to evaluate as interesting reading :

 

----> http://www.bibliotecapleyades.net/archivos_pdf/oppenheimer_einstein.pdf

 

About the rocky part of your post, makes not much sense. When astronauts landed on the moon, they picked some rocks and left many others.

[Spyman]

Well, haven't we been experimenting a bit with radio waves and sending random pieces of information into space for no obsolute reason... Either they find this offensive or they find it like a love letter. And the chances are that 'advanced life' exists is highly possible. Am I correct that we are made out of 'space-stuff' so Hydrogen fuses to Carbon, blah, blah, blah... They can be made out of the same stuff that we are made from and have the elements to build an 'advanced' piece of technology. This can be possible by the Drake equation:

 

Sure we have, but the Milky Way is huge and we have not had the radio technology for very long, so our signals have not reached very far.

 

Earth calling... but not very far: The tiny yellow dot in our galaxy that shows the (comparatively small) distance radio broadcasts have travelled in a century of reaching out to aliens

 

Since the invention of radio more than a century ago, man has been broadcasting into space in the hope that any listening aliens could learn of our presence.

 

Yet, despite waves travelling a distance of 200 light years in all directions, they still have 118,800 light years to go until the entire Milky Way has heard the word.

 

In the photograph below, the small yellow dot - with the even tinier Planet Earth buried somewhere in its centre - reveals the limited extent of broadcasts since Marconi invented the radio in 1895.

http://www.dailymail.co.uk/sciencetech/article-2107061/Earth-calling-Tiny-yellow-dot-shows-distance-radio-broadcasts-aliens-travelled.html

 

 

And while I agree that the chances for primitive life elsewhere is highly possible, the probabilities for advanced technological life is much much harder to determine.

 

Criticism of the Drake equation follows mostly from the observation that several terms in the equation are largely or entirely based on conjecture. Star formation rates are well-known, and the incidence of planets has a sound theoretical and observational basis, but the terms in the equation become increasingly speculative from left to right. The uncertainties revolve around our understanding of the evolution of life, intelligence, and civilization, not physics. No statistical estimates are possible for some of the parameters, where only one example is known. The net result is that the equation cannot be used to draw firm conclusions of any kind, and the resulting margin of error is huge, far beyond what some consider acceptable or meaningful.

http://en.wikipedia.org/wiki/Drake_equation#Criticism

 

 

If we assume that several alien civilizations exists in the Milky Way, that are carbon based like us and have very advanced technology, then what do you think they would be like, in what purpose would one of them come here and would they be friendly or hostile?

[IAstroViz]

The chances that aliens would arrive here are not so high... But, for us humans we would think that 'it' would be hostile and we will start launching nukes at them... And they might think we are hostile... It's human nature that cuts of the peace treaty (if you know what I mean)... Even as neandertalers we had to do things that wasn't by our nowaday morals... It's more of: Do before you think kind of thing going on... If aliens do arrive...

[Spyman]

It is possible that the Neanderthals were a separate species and we (Homo sapiens) were the aliens coming to Europe and then caused their extinction by violent competition for food and shelter.

 

As the 2014 study by Thomas Higham of Neanderthal bones and tools indicates that Neanderthals died out in Europe between 41,000 and 39,000 years ago, and that Homo sapiens arrived in Europe between 45,000 and 43,000 years ago, it is now apparent that the two different human populations shared Europe for as long as 5,000 years. The exact nature of biological and cultural interaction between Neanderthals and other human groups has been contested.

 

Possible scenarios for the extinction of the Neanderthals are:

1.Neanderthals were a separate species from modern humans, and became extinct (because of climate change or interaction with humans) and were replaced by modern humans moving into their habitat between 45,000 and 40,000 years ago. Jared Diamond has suggested a scenario of violent conflict and displacement.

2.Neanderthals were a contemporary subspecies that bred with modern humans and disappeared through absorption (interbreeding theory).

 

As Paul Jordan notes: "A natural sympathy for the underdog and the disadvantaged lends a sad poignancy to the fate of the Neanderthal folk, however it came about." Jordan, though, does say that there was perhaps interbreeding to some extent, but that populations that remained totally Neanderthal were probably out-competed and marginalized to extinction by the Aurignacians.

 

mtDNA-based simulation of modern human expansion in Europe starting 1600 generations ago. Neanderthal range in light grey.

http://en.wikipedia.org/wiki/Neanderthal#Extinction_hypotheses

 

From the human behavior that occurs whenever more advanced technology reach less advanced territory, we better hope that any visiting aliens are not competitive like us and that we don't have anything they need or desire.

[pavelcherepan]

It is possible that the Neanderthals were a separate species and we (Homo sapiens) were the aliens coming to Europe and then caused their extinction by violent competition for food and shelter.

 

http://en.wikipedia.org/wiki/Neanderthal#Extinction_hypotheses

 

From the human behavior that occurs whenever more advanced technology reach less advanced territory, we better hope that any visiting aliens are not competitive like us and that we don't have anything they need or desire.

 

Spyman, I think it's been identified that a good deal of Neanderthal DNA has survived in modern human populations of non-African descent, so maybe there was some violence and competition, but also a good deal of interbreeding too.

 

http://www.nature.com/nature/journal/v507/n7492/full/nature12961.html

http://www.sci-news.com/othersciences/anthropology/science-neanderthal-genes-modern-human-dna-01734.html

http://www.livescience.com/42933-humans-carry-20-percent-neanderthal-genes.html

 

Also, there are some authors that consider Neanderthals as a subspecies of Homo Sapiens:

 

http://www.ncbi.nlm.nih.gov/pubmed/14745010/

[fiveworlds]

What happens if Aliens arrive?

 

Don't know about you but I'd duck and cover. Don't have no damn space cannons and we have no defense against a hostile alien attack.

Edited April 30, 2015 by fiveworlds

[IAstroViz]

Finally some humor!

[Spyman]

Spyman, I think it's been identified that a good deal of Neanderthal DNA has survived in modern human populations of non-African descent, so maybe there was some violence and competition, but also a good deal of interbreeding too.

 

http://www.nature.com/nature/journal/v507/n7492/full/nature12961.html

http://www.sci-news.com/othersciences/anthropology/science-neanderthal-genes-modern-human-dna-01734.html

http://www.livescience.com/42933-humans-carry-20-percent-neanderthal-genes.html

 

Also, there are some authors that consider Neanderthals as a subspecies of Homo Sapiens:

 

http://www.ncbi.nlm.nih.gov/pubmed/14745010/

Yes, you are correct, research shows that interbreeding took place and the Neanderthals location in our family tree is still contested.

(Good points +1)

 

But my main point that the Neanderthals was not our main ancestor and that they didn't survive as a species when our ancestors arrived to their territory still stands. There are no Neanderthals walking on Earth today, only Homo sapiens with traces of Neanderthals in them.

 

Looking back at our known history regarding interactions with newly discovered and very different cultures, I think there was in general lots of mistrust, hostile competition and violence, but certainly also events with peaceful interaction and trading.

[IAstroViz]

Well, yes you are correct, again. But you have to think, If aliens do come here with their space ships, they would be more of a threat than humanity. There are somethings in our human nature that we can't control. For example fear.

[Robittybob1]

Well, yes you are correct, again. But you have to think, If aliens do come here with their space ships, they would be more of a threat than humanity. There are somethings in our human nature that we can't control. For example fear.

If aliens come here I'm going to welcome them, for I have my doubts about humans finding a way out of here on their own.

[IAstroViz]

Very general opinion, but OK!