Scientists Have Surprisingly Specific Answer on Alien Life

There really is a simple reason for why we have not been visited by aliens. Cows and people (especially older people) produce large quantities of methane. We are the only beings in the universe who can stand it, which is why we live here and they don't. :)

I still think that as long as we continue to think of all other life in the universe as being and communicating like us, we will fail to recognize alien life when it is staring us in the face.

Tony
 

I wouldn't be at all surprised to learn that aliens are doing their best to prevent us from leaving Earth and settling on other planets. We were given a beautiful planet which provides humans with everything they need, but we are doing our best to destroy it. What other species destroys its own habitat?
 

I didn't read it, but how can they possibly estimate this? It sounds like a spoof
from the Onion or Weekly World News--both online humor.
Why 36? Why not 336? 3336?
 
gennie said:
And maybe, just maybe - earth is, to the universe, the equivalent of an ant farm. "Let's drop in this crumb of bread/bit of gold and see what they do" or "put in this ant of a different color and see what happens."

https://www.amazon.com/Light-up-Ant-Habitat/dp/B07W3NLRVG
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One thing I've learned, to not take this world overly serious, and when life comes to an end, don't expect that there's going to be anything waiting for you.
 
fmdog44 said:
Prove it.
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O.K.. prove I am wrong.
Here's my take on it. So far life has not been found anywhere else in the universe that I know of.
Take the moon. Close to the Earth. Dead as a doornail as are the rest of the planets in our solar circle. They are incapable of supporting life as we know it. I'm not interested in fungi or mushrooms. I'm talking about intelligent humans.
And although scientists know what life means and what the ingredients are, they have yet to create 'life' from scratch. It always is a seed or a clone from existing life.
From my youth, I always questioned this topic and I stayed interested in it and followed it. Every once in awhile it comes up for discussion. At one time I supported the theory that there were other worlds out there but I changed my mind as I got older.
In order to support life on Earth as we know it, there had to be a series of combinations which are not common in the universe from what I see about space probes. That's why I call the Earth a fluke in the universe.

First of all, liquid water. Common on the Earth, that's why it's called the blue planet.
Then the Earth is just the right distance from the sun to support life and in an orbit that won't get too close to the Sun.
We have extremes even on Earth that are not habitable. Even if we go up 1000 feet we can't survive without oxygen.
Then we have an atmosphere that protects life on Earth from the harmful radiation from the sun. And from invasive meteorites that burn up in the atmosphere. And have a look at the Aurora's which are harmful radiation and are stopped in the atmosphere.
Then we have the proper combination of oxygen, carbon dioxide, and nitrogen to keep the Earth stable keep it from burning up and being able to create food.
Mars doesn't have that and it's the closest planet to the Earth.

So that's my take. What have you got?
 
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Recognizing the limits of what I can know, it would be difficult for me to make a definitive statement as to whether or not there is intelligent life in the universe. Notice that I did not say "other intelligent life in the universe". Watching what is going on in our immediate world, I can't say that I see signs of intelligence here. Heck, I don't even know WHY we are here or what purpose the universe has, or even if the universe as we claim to know it is all there is.

Tony
 
tbeltrans said:
Recognizing the limits of what I can know, it would be difficult for me to make a definitive statement as to whether or not there is intelligent life in the universe. Notice that I did not say "other intelligent life in the universe". Watching what is going on in our immediate world, I can't say that I see signs of intelligence here. Heck, I don't even know WHY we are here or what purpose the universe has, or even if the universe as we claim to know it is all there is.

Tony
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Thing of beauty... well said!
 
What difference does it make? Space and time present obstacles that can't be overcome. This planet has been here for 14 billion years and if interstellar travel were possible, we would already have had visitors. And please don't tell me the pyramids were built by aliens or any other such nonsense.

For all intents and purposes, we are alone.
 
JimBob1952 said:
. . . This planet has been here for 14 billion years . . .
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The earth is about 4.5 billion years old, not 14 billion.
The universe is about 13.8 billion years old.
The earliest undisputed evidence of life is about 3.5 billion years old . https://en.wikipedia.org/wiki/Earliest_known_life_forms

Thus far, we have no evidence of life anywhere other than on earth. But there exist untold billions of galaxies each holding billions of stars, many (perhaps most) of which have planets. So even if only a small percent of planets are capable of developing life, there are still an enormous number of planets which could have had, or do have, or will have life.

As technology improves, it is hoped that we will learn to detect possible signs of life at astronomical distances. For example, an atmosphere similar to that on earth would suggest the presence of life. Chemicals that do not exist naturally might suggest an industrial civilization.

Whether or not life exists elsewhere may not make any difference in our daily lives, but I would like to know.
 
raybar said:
The earth is about 4.5 billion years old, not 14 billion.
The universe is about 13.8 billion years old.
The earliest undisputed evidence of life is about 3.5 billion years old . https://en.wikipedia.org/wiki/Earliest_known_life_forms

Thus far, we have no evidence of life anywhere other than on earth. But there exist untold billions of galaxies each holding billions of stars, many (perhaps most) of which have planets. So even if only a small percent of planets are capable of developing life, there are still an enormous number of planets which could have had, or do have, or will have life.

As technology improves, it is hoped that we will learn to detect possible signs of life at astronomical distances. For example, an atmosphere similar to that on earth would suggest the presence of life. Chemicals that do not exist naturally might suggest an industrial civilization.

Whether or not life exists elsewhere may not make any difference in our daily lives, but I would like to know.
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Thanks for the correction, you are absolutely right of course about the estimated age of the earth.

It might indeed be nice to know of other life. I just wanted to point out that flying saucers don't regularly come here, watch a US presidential debate and then fly home in horror. Although it would be understandable if they did.
 

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