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Is there life on other planets?

Considering the number of stars in the universe, even if only a few of them have planets, it seems highly unlikely that Earth is the only planet supporting life.

However, it seems that all life on Earth evolved from a single ancestor, suggesting that abiogenesis is extremely rare. It is possibly so rare that it has only ever happened once anywhere?
Harriet03 · 41-45, F
Sometimes I wonder about the "life" on this site! Nevermind the Universe 🤷‍♀️
newjaninev2 · 56-60, F
@Harriet03 As the joke goes: Is there intelligent life anywhere in the universe? So far... nothing
suzie1960 · 61-69, F
@newjaninev2 @Harriet03

https://www.youtube.com/watch?v=buqtdpuZxvk

[i]And pray that there's intelligent life somewhere out in space,
'Cause there's bugger all down here on Earth![/i]

;)
newjaninev2 · 56-60, F
@suzie1960 lol! Yes, it's brilliant, isn't it! Monty Python rocks!
Zaphod42 · 46-50, M
On the other hand the fact that life first appeared on Earth only a few million years after it's formation would suggest that life either readily forms and thus may be fairly common, or that life here originated elsewhere and that panspermia may have spread life to any and all planets capable of supporting it.
JoBlak · M
@SW-User OMG. Can you imagine if we are the most sophisticated life in the whole multiverse? Doesn't bear thinking about.
SW-User
@JoBlak no.... And look at those we elect. 🤦‍♂️
JoBlak · M
@SW-User I don't even want to think about that!
hippyjoe1955 · 61-69, M
The Creator can certainly put life anywhere He decides. However we may never know about it this side of the grave.
SW-User
Think of all the species on this planet before us. Millions of years of evolution then we pop up. Maybe many are populated but sentient beings like us are very rare maybe.

The Fermi Paradox
@SW-User We're weirdos😭
CharlieZ · 70-79, M
It´s entirely posible or it seems so.
Quite probable indeed.
May be there are "local" factors (local at the scale of the Universe) involved in the details of how life emerged in a certain planet.
Details that may not inhibit the occurence of life given the main causal factors. But may introduce variations in a path dependent chain of physical events.
Includding, among others, the "local" probability of an origin in abiogenesis.
suzie1960 · 61-69, F
@CharlieZ Good points. It could be rare enough to have occurred only once on this planet but many times throughout the universe.
Harriet03 · 41-45, F
[image deleted]
Tastyfrzz · 61-69, M
I would like to think so. It seemed to happen fairly quickly here. Possibly on multiple occasions. Since our planets' chemistry is pretty similar to most others it seems likely that it would be quite common.
Tastyfrzz · 61-69, M
@suzie1960 http://adsabs.harvard.edu/full/1936PA.....44Q.442L
Tastyfrzz · 61-69, M
@suzie1960 https://www.newscientist.com/article/2131136-microbes-might-thrive-after-crash-landing-on-board-a-meteorite/

This one is even a bit more interesting in that is suggests that bacteria on earth have evolved to handle transport by meteorite. Apparently it happened often enough that the cells evolved so that the cell walls stiffen during impact so as to survive the temporary high pressures. It kind of proves that this did happen. Otherwise there would have been no need for such a feature.
suzie1960 · 61-69, F
@Tastyfrzz Thanks for those links. I'm a bit busy right now so I'll take a look later.
JoBlak · M
I think given the number of stars in the universe as 100 octillion. We know, as we exist, that the probability of life starting is greater then zero. I think that even if the actual probability is between zero and a stupidly small number, with 100 octillion stars around, then I cannot help feeling that life, it could be assumed, is likely to have started round at least other one star.
Eddiesolds · 61-69, M
I think there is.always have.
SatanBurger · 36-40, F
Well it depends, most people envision alien races as highly intelligent when in reality alien life could range from many different sources like plants, non self aware entities, all the way to self aware beings but who says their smart just because their self aware, though they could be intelligent.

So aliens most likely exist but may not be what we envision them as, and I think that's more possible than how we evolved.
suzie1960 · 61-69, F
@SatanBurger I did mean life in any form, not necessarily intelligent or humanoid life. It just occurred to me that, if abiogenesis were reasonably common, we should find more than one evolutionary line on Earth.
GlassDog · 41-45, M
I take two views:

One, that we can't predict the probability of life based on our own existence, because we already exist.

Two, I think it's highly likely that life has and will evolve elsewhere, that it will take billions of years to reach an advanced state (where it has the tools to destroy itself and its planet) and then just centuries to bring about the destruction. In that sense, 99.99999% of alien life is microbial or otherwise primitive and 0.000001% of alien life has technology akin to our own.
gol979 · 41-45, M
Billions of planets in the goldilocks zones so the chances are fairly high that there is other life
suzie1960 · 61-69, F
@gol979 Agreed and, considering the inhospitable places life has been found to exist on Earth, the Goldilocks zone could be a lot bigger than we think.
CookieLuvsBunny · 31-35, F
Statistically one would think that there is life on other planets. But the distances between inhabited planets is probably so great that they can never know of the other's existence
Ynotisay · M
@CookieLuvsBunny And that's the thing about science. It's all about the proof.
CookieLuvsBunny · 31-35, F
@Ynotisay If it is unprovable then it's a faith statement
Ynotisay · M
@CookieLuvsBunny Yep. I don't tend to swim in those waters which is why the TV shows on alien's and UFO's just blow my mind. :)
That's very profound. I agree; it would be extremely unlikely Earth would be the only planet supporting life. I believe life is abundant in the universe. I also think abiogenesis doesn't exist at a quantum level. Even the amino acids which were the building blocks of life on Earth, had a foundation of which science may not yet be aware.
SW-User
There's the Fermi Paradox for you. And why the human race can be so frustrating at times we just all bicker and squabble when we could be the highest intelligence in the universe and what are we really doing with it?
QuixoticSoul · 41-45, M
Statistically... pretty much has to be out there somewhere.

We’ll probably never run into them though.
QuixoticSoul · 41-45, M
@QuixoticSoul I don’t think the common ancestor is a big indicator of anything really - the early arrival would have no competition and would quickly dominate. Anything coming after would never even get off the ground.
Ynotisay · M
The verdict is still out if there was ever life on Mars since liquid water and buried organic matter was discovered. And there's some other spots in our solar system that seem to have some of the prerequisites for life.
Gusman · 61-69, M
With 200 billion stars in the Milky Way Galaxy and 170 billion Galaxies in the observable universe there will be life out there.
Scientist estimate there could be 1 to 2 trillion Galaxies
samueltyler2 · 80-89, M
Considerring the concept of infinity, there could be a parallel universe almost identical to ours.
suzie1960 · 61-69, F
@samueltyler2 In a truly infinite universe, every probability becomes a certainty.
Tastyfrzz · 61-69, M
@samueltyler2 they think they've found two. Apparently universes are arranged like beads on a string. They can see the temperature change in the blackbody microwave readings.
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Nope because God left us here. And we're his only chillun
At this point in time no one knows for sure.
FeetAreFantastic · 41-45, M
I think it is pretty certain that there is life in abundance in the universe and not rare at all. It just seems rare because it is so unfathomably far way because the universe is so incomprehensibly big.

So likewise, abiogenesis would not be rare either. I don't know how evolving from a single ancestor changes that. That single ancestor could have come to be via abiogenesis.
suzie1960 · 61-69, F
@FeetAreFantastic I believe the evidence is currently pointing to a single point of origin.
FeetAreFantastic · 41-45, M
@suzie1960 Okay. Well that doesn't change what I said. There is still life in abundance in the universe as abiogenesis would not be rare at all on this scale. :)
@suzie1960 I agree and believe the gov't has known about it for many decades but is hiding it from the public. Here's an example of a variety that are said to have visited:


* https://img.youtube.com/vi/YuwDXukkI9U/0.jpg

 
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