Do you believe aliens exist?

Do you believe aliens exist?

  • Yes

    Votes: 215 81.1%

  • No

    Votes: 50 18.9%
  • Total voters
    265
I see it this way

the universe is 13.8byo (so say the scientists)

the earth is 4,5byo (so say the scientists)

counting backwards - 13.8 - 4.5= 9.3

so from the big bang to 9.3by - life must have evolved elsewhere and is probably by now way more advanced than we could ever imagine.
 
rietrot said:
It's quit a complicated subject, but I'm certain life only formed once. Considering everything we know about abiogenesis(which is fairytale BS)and life on earth. I doubt very much that we will ever find even microbial life anywhere else.
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I still don't quite see how any knowledge about life can carry constant exrapolatory (wtf word?) power out into the cosmos about the existence of other life. Surely the bigger the space for potential life, the less our certainty about it's occurrence becomes?

The odds of a 5 appearing on a 100-sided dice in a single throw is 1/100
However, the odds of a 5 appearing on a 100-sided dice if 1 billion people throw it is virtually guaranteed. It would be statistically null for a 5 not to occur.

Those same statistical intuitions don't carry over into the emergence of life for you? Or is it a mistake to think about this in terms of probabilities?
 
mercurial said:
No one said space dust creates life, merely that life already existed and seeded this planet with the building blocks of life.
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That completely goes against the big bang theory of the universe having a "start" point. No life existed then, so you have to have a point and process of how the first life formed before you can think up fanciful ways of life hitching a ride on a comet to distant planets. I don't even see the need to go into something like panspermia.
 
rietrot said:
That completely goes against the big bang theory of the universe having a "start" point. No life existed then, so you have to have a point and process of how the first life formed before you can think up fanciful ways of life hitching a ride on a comet to distant planets. I don't even see the need to go into something like panspermia.
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I really don't have the energy to explain this again.
 
Yes, awful lot of wasted space if there isn't... will we ever meet any cruising around, who knows, I don't think so, them, like us, will just upload, thats assuming we haven't already, then again, is it possible simulation to create a simulation and upload:whistle:
 
rietrot said:
That completely goes against the big bang theory of the universe having a "start" point.
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It has nothing to do with the Big Bang.

For example life could've arisen on Mars and brought here after a meteorite impact with Mars caused microbial-riddled rock to be kicked up and eventually pulled into earths atmosphere. Yeah it's a long shot, but it doesn't seem impossible. It might then also occur over much greater distances given enough time.
 
saor said:
It has nothing to do with the Big Bang.

For example life could've arisen on Mars
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This is my point. It arisen somewhere. You need a start point before you can just willy-nilly claim life hitched a ride on a comet. This is also unnecessary complicated. The simplest solutions is usually the correct one, so we know there's life on earth so that means it started here.
 
spiff said:
the universe is 13.8byo (so say the scientists)

the earth is 4,5byo (so say the scientists)
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They don't say that, they say the observable universe is 14 bn years old, because of how light works the other parts will never be seen
 
rietrot said:
This is my point. It arisen somewhere. You need a start point before you can just willy-nilly claim life hitched a ride on a comet. This is also unnecessary complicated. The simplest solutions is usually the correct one, so we know there's life on earth so that means it started here.
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I'm not aware of anything to do with the Big Bang theory or abiogenesis that dictate that life must only have formed once in one place. I could be wrong but I think you're mistaken here.
 
I actually have no idea.
Planet-based life or not?
It's possible that the entire universe is one big mirage, and we're down here dreaming of being sentient life forms.
It's also possible that the entire universe is alive, in and of itself, and that some of that aliveness has condensed onto the planet Earth.
So. I don't know.
 
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