Do you think that aliens exist ?

Question

Plz dont post spam, a yes or no is fine

Answer 1

Yes, but with a qualifier or two.

It seems unlikely we are alone in the galaxy.

Chemistry seems quite capable of creating the basic substances for life and as it is likely that there are billions of moons and planets to work with it seems likely SOME kind of life is out there.

However, the odds of intelligent life happening to be both currently alive (an not extinct by some means) and anywhere close enough for us to detect with even future technology seems pretty remote.

By some basic numbers

300 billion stars in our Galaxy
Assume half are old enough to have formed in the metal rich clouds to have life sustaining chemical reactions 150 billion
Assume half of these may have planets capable of supporting life 75 billion
Assume further that half of these worlds actually have life on them currently (it is relatively easy to generate mass extinction scenarios) 37.5 billion
Assume these life forms live on land and not in water (most life on earth is aquatic, and will never develop beyond most rudimentary technology without fire) Say 10% of previous number or 3.7 billion planets

Sounds promising so far?

Assume the collosal odds of evolution, chance, mass extinction survival, sufficient material wealth, species adaption to develop
technology. 1% of 3.7 billion or 37 million civilizations

Assume life expectancy of an average technological society at 1 million years? Why? just because. Humans have managed about 10 000 years, call me an optimist and we last for 1 million

Now how many technological civilizations are currently in the galaxy? If they have existed on and off for roughly half the age of the galaxy (7 billion years) 7 billion years divided by 37 million civilizations or 189 currently existing technological societies

Now what is the average distance between them?

Imagine the galaxy is a circle (it is not) approximately 300 000 light years across and sprinkle our 189 technological civilizations more or less evenly around it.

I come up with a ball park estimate of 1 civilization per 375 million "square" light years, or put another way, each technological alien civilization is no closer than 20 million light years.

These numbers are far from scientific, but give an indication how rare extraterrestrial life is even to optimists like me.

If humanity survives a million years, we would be lucky to meet one!

Answer 2

A residing undertaking desires liquid water, means, and a life source which incorporate a comet. There are planets like Earth that could help life which incorporate Gleise 581g, even though it is purely too a approaches away for us to do something approximately it. Im specific that there would desire to be life someplace accessible in a planet that has liquid water, means (a solar) and a life source, if it has that than that is specific there would be life yet i'd think of it would not be any further than parasites and micro organism. additionally, such as you mentioned, it might desire an environment and a powerful temparture, if somebody says that there ought to be life on Mars, It cant be actual via fact it doesnt have an atamosphere like Earth's, in actuality it purely has a million% of it so life on Mars isn't able. If the creature isn't some thing small like that, it might desire brains, additionally, atleast one in each of our satelites would have observed it. some style of examining would have been recorded like a extreme pitch screech.

Answer 3

Yes! Think how little we know about the universe. We have only "visited" the moon, no other place. I don't believe that oxygen or the water is a "must" for the life. And we cannot generalize the life, as we know only from the earth. There should be some other life-styles.

Answer 4

Of course.Personally i think that people`s knowledge has been tricked by aliens.I mean how could it be that human could do so much those days and without any modern machinery.People found in oooold caverns odd pictures of creatures with big round masks with which we identified aliens today. Now isn`t that weird!I believe in alien but i`m a bit afraid that after all these milleniums they might hastil and not friendly anymore.

Answer 5

If an alien is a being from a place other than planet earth, then yes.

but unlikely to be a form silimar to us, why would nature make the same mistake twice eh ?

Answer 6

Yes. I think that it would be pretty presumptuous of the human race to believe that we are the only ones with "superior" intelligence. There are so many other galaxies out there that logic demands that at least a few more of them are capable of supporting other life forms.

Answer 7

Why do we call them "aliens"? I guess the same reason we're called "humans". I think other life could very possibly live somewhere out there. I would love to be the one to find out for sure. That would be pretty cool.

Answer 8

i think the universe harbors many civilizations of diverse life forms, and i do believe that we have been visited by an advanced civilization from outer space. just because they havent blown us up yet or we havent seen them yet, doesnt mean they dont exist right? it just wouldnt make any sense that earth is the ONLY planet or star or mass in the entire universe that has any form of life on it.

Answer 9

Ask any dolphin, chimp or dog...and not neccessarily in that order about aliens.


Then go to "Martian Chronicles" by Ray Bradbury, and look into the canal.

Answer 10

In Space No One Can Hear You Scream