Extraterrestrials doesn't exist

3 days ago by borokov to c/unpopularopinion

We are the only life form of the univers. Not even the only intelligent, but the only one. My arguments are:

Life is absolutely everywhere on earth. There is not a single isolated island or deep trench in the ocean that is not covered by life. If life can live elsewhere, univers would be covered by life. Some bacteria would have been ejected into space by some cataclysme and had colinized nearby planets. Kind of Fermi's paradoxes.

Antropic argument. Our universe is suitable for life because if it weren't, we simply wouldn't be there. Add it to Okam razor. If a smaller, simpler, universe could handle life, we would be in that one. Not our current one.

"Our universe is so huge, so there must be other life form" is not the right statement. Our universe is so huge because it is the smallest universe where life could potentially appear.

Only my opinion, not a scientific demonstration.

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Dyskolos 9 points 3 days ago

The closer the universe is to being infinite, the more likely ANYTHING that is possible, will happen. Like life, in whichever form.

It might not be technically infinite, but so incredibly gargantuanly vast, that to us finite Lil meatsacks, it basically is.

Even if the chance for developing life might be infinitesimal, there are a real lots of dice-rolls in that universe, so why should it be only us...

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borokov 3 points 3 days ago

Be carefull. An infinite sum of values doesn't always give an infinite value 😉 And even if universe huge, it is far from being infinite.

When dealing with probabilities and combinatory, you can reach crazy values. As example, there are more 128bits RSA keys than there are atoms in the whole universe.

And if something has a probability of for ex. 10e-80 to happen, you'll need a shitload numbers of universe to makes it happen.

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vrek 3 points 3 days ago

Or just billions of years of chances....

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borokov -1 points 3 days ago

Actually, life won't be possible anymore in some billions of years. Not enough stars anymore, too much spaces between galaxies. Too Much darkness 😢

We are in the very brief bright moment of the universe.

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AwesomeLowlander 1 point 2 days ago

Not enough stars anymore, too much spaces between galaxies. Too Much darkness

Life on earth isn't dependent on any other star, none of what you mentioned is relevant to life arising on earth.

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borokov 1 point 2 days ago

Life did depend on other stars. At the very beginning, there were only hydrogen in space. Then 1st generation of stars built helium by fusion then explode, creating second generation of stars that create heavier elements and so one.

Life really couldn't appears in a single star universe, because there were just not enough "atomes factories".

OK, now the matter is here, other stars might not be required anymore. But stars have a very limited life time. Sun will explode in ~5 billions years, so do other stars. Other stars will born, but this is not unlimited. Once every atoms will be fusion into heavy elements, there just won't be new stars anymore and univers will enter in its dark era. This should happen in ~100 billions years. Then there will just be blackhole during 10e100 years, and then very slow decay during something like 10e(10e(10e10)) years. At least, it is one of the currently admitted theories.

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AwesomeLowlander 3 points 2 days ago

Yes, my point is as long as there's new stars that's all you need, it doesn't matter if they're rare or far apart, unlike what you stated.

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