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Humans May Be the Only Intelligent Life in the Universe, If Evolution Has Anything to Say.

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Mindful

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^ Are we alone in the universe? It comes down to whether intelligence is a probable outcome of natural selection, or an improbable fluke. By definition, probable events occur frequently, improbable events occur rarely — or once. Our evolutionary history shows that many key adaptations — not just intelligence, but complex animals, complex cells, photosynthesis, and life itself — were unique, one-off events, and therefore highly improbable. Our evolution may have been like winning the lottery … only far less likely.

The universe is astonishingly vast. The Milky Way has more than 100 billion stars, and there are over a trillion galaxies in the visible universe, the tiny fraction of the universe we can see. Even if habitable worlds are rare, their sheer number — there are as many planets as stars, maybe more — suggests lots of life is out there. So where is everyone? This is the Fermi paradox. The universe is large, and old, with time and room for intelligence to evolve, but there's no evidence of it.

Could intelligence simply be unlikely to evolve? Unfortunately, we can't study extraterrestrial life to answer this question. But we can study some 4.5 billion years of Earth's history, looking at where evolution repeats itself, or doesn't.
 

johngaltshrugged

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Humans aren't the only intelligent life on Earth.
Apes, dolphins, etc. all have a degree of intelligence, not as much as humans, but more than Briben, Kamala & most of DC.
 

gipper

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If the universe is finite then there will be unique things in it. Life could be unique to earth.

We have been working on trying to create life in a lab for decades and decades and have not been successful. This suggest that the process is so complex that it may not have happen elsewhere.
 
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If the universe is finite then there will be unique things in it. Life could be unique to earth.

We have been working on trying to create life in a lab for decades and decades and have not been successful. This suggest that the process is so complex that it may not have happen elsewhere.

The whole article goes into that.
 

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rightwinger

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To support life, a planet must maintain a certain temperature range, have water and a somewhat stable climate

Those planets are few and far between

Most planets with life are more likely to have some sort of slime than intelligent life
 

gipper

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Maybe the thought of us being really alone is too scary to comprehend.
Not really because it’s utterly impossible, when you consider the enormity of the universe, which is difficult for the human mind to comprehend.
 

gipper

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To support life, a planet must maintain a certain temperature range, have water and a somewhat stable climate

Those planets are few and far between

Most planets with life are more likely to have some sort of slime than intelligent life
Got any proof of this? We don’t even know the number of planets in the Milky Way, let alone the universe.
 
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rightwinger

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Got any proof of this? We don’t even know the number of planets in the Milky Way, yet alone the universe.

The whole universe has to use the same Periodic Chart
Same elements, same elementary compounds

Setting up conditions for sustainable life is the exception, not the rule
 

Moonglow

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JackOfNoTrades

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Maybe the thought of us being really alone is too scary to comprehend.
That's the plot of the movie "Ad Astra". Humans ARE alone in the universe. And for a lot of people, that scares them shitless.
It's why the constant obsession with UFO's. It gives them comfort that there are visitors to our planet and it reaffirms belief
in conspiracy theories that the truth is being hidden from us. Personally, I find it amusing, but also tiresome. With all of the
issues in this country that need addressing and a moon we really should be looking at getting back to, having hearings on UFO's
is complete waste of time and resources.
 

postman

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If the universe is finite then there will be unique things in it. Life could be unique to earth.

We have been working on trying to create life in a lab for decades and decades and have not been successful. This suggest that the process is so complex that it may not have happen elsewhere.

With the number of habitable planets in the galaxy, no less universe, over a time span of billions of years you can't say earth would be unique.

The timeline of life on earth begins over 4.5 billion years ago. In the beginning, survival was difficult for any life forms. The struggle started and soon after earth’s formation, organisms start appearing. It makes sense the first signs of life on planet earth are incredibly simple.

Now start the evolution clock,. First stop.

The evolutionary history of the primates can be traced back 57-85/90 million years. One of the oldest known primate-like mammal species, Plesiadapis, came from North America; another, Archicebus, came from China. Other similar basal primates were widespread in Eurasia and Africa during the tropical conditions of the Paleocene and Eocene.

Next stop.

Australopithecus Africanus is the first of the early ape species classified as hominids. They existed for about 3.5 – 2.45 million years ago found only in South Africa. Australopithecus Africanus were known for their slender build. They were bipeds with curved fingers for tree climbing.

Last step.

While our ancestors have been around for about six million years, the modern form of humans only evolved about 200,000 years ago.

Given a class "M" planet, and enough time, it's like monkeys typing Shakespeare
 

postman

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We have been working on trying to create life in a lab for decades and decades and have not been successful.

If Rome wasn't built in a day, does that mean Rome could not exist?

Man has been working on creating life for decades. God or evolution has been at it for billions of years
 

gipper

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The whole universe has to use the same Periodic Chart
Same elements, same elementary compounds

Setting up conditions for sustainable life is the exception, not the rule
Means nothing if you’re capable of understanding the SIZE OF THE UNIVERSE.
 

postman

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To support life, a planet must maintain a certain temperature range, have water and a somewhat stable climate

Those planets are few and far between

Most planets with life are more likely to have some sort of slime than intelligent life

It depends when you look. Earth has had intelligent life for only 0.000005th of it's habitable existence. On that time scale, if you blink you could have missed it.

But offset that against the sheer size of the universe, and how many habitable planets exist. Maybe the question should be, is there intelligent life, within range of our detection
 

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