Am 26.09.2014 17:00, schrieb Saul Luizaga:

> news://news.povray.org:119/54256812@news.povray.org here I explain that
> are not only theories. Aliens, can't be discarded, a lot of BS about
> them, but still many things without explanation,

Now /that/ is an "argument from ignorance": Jumping from the fact that 
there are still "many things without explanation" to the conclusion that 
therefore a given theory X (in this case, "there are aliens"), that 
would /happen/ to explain them, /must/ be true.

But you're right indeed: Aliens can't be discarded. Nor have they been 
confirmed to have set on this planet (or even come into its vicinity) to 
this date.

> and there is a
> plausible number of hundreds of intelligent species to be alive right
> now in the know Universe,

That is plausible indeed, some would even say almost inevitable, but 
those hundreds of intelligent species might still live the same isolated 
life as we do on our own planet.

In fact, the anthropic principle would suggest (albeit not necessarily 
imply) that if interstellar travel is feasible, we'll be the first 
species to do it. Otherwise, the dominant species on our planet 
(dominant to the extent that evidence would be everywhere) would 
probably not be humans but some extraterrestrial species already.

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