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Lemmiwinks

02/13/21 8:18 PM

#325218 RE: Lemmiwinks #325217

4. We live in a simulation whose rules we have not yet deciphered.

My brain hurts...more beer.
Lem

hankbb02

02/13/21 8:24 PM

#325223 RE: Lemmiwinks #325217

You also have to consider that we have only had this technology for such a short period of time in the grand scheme of the universe.

Tal10

02/13/21 8:55 PM

#325228 RE: Lemmiwinks #325217

5. Civilizations that have become so advanced understand the importance of not interfering with the development of an alien planet.

Fermis Paradox

02/14/21 12:00 PM

#325268 RE: Lemmiwinks #325217

Actually, Lemmiwinks there are many more permutations of the paradox. Astronomer Stephen Webb has lectured on this extensively and written a book where he gives 50 potential solutions. Also the book Rare Earth https://en.wikipedia.org/wiki/Rare_Earth_(book) is another nice companion outlining why intelligent life might actually be quite rare. I mean just on out planet microbial life developed in about 500 million years - so not that difficult. Then it took about two billion years to get to multi-cellular life. The dinosaurs ruled the earth for about 280 million years, developed some reasonably [likely] intelligent species but none capable of building a radio telescope. Of all the myriad species on earth only one so far is capable of building a radio telescope - although one might expand that to Neanderthals and Denisovans. So the three species human, Neanderthal, Denisovan, who might be capable of building a radio telescope have been around for 400K years. And yet, civilization and agriculture only developed 10K years ago - what took so long? And again in 10K years of civilization only one built a radio telescope . 3500 years of Egyptian civilization didn't come close.

So the point is there are a lot of filters and we might be the only intelligent civ in the galaxy.

sts66

02/14/21 2:02 PM

#325284 RE: Lemmiwinks #325217

If you believe it's impossible to travel faster than the speed of light there's no paradox at all - with literally billions of potential Earths in the Universe it's highly likely there's advanced life forms on some of them, maybe thousands of them - to think the Earth is unique is the height of ego-centrism. Hell, there's strong evidence that the very first life forms here came from outer space - every precious metal on earth came here via meteors, conditions on earth were never capable of making silver, gold, platinum, iridium, etc.

The problem with speed of light travel is time dilation - a crew on a spacecraft traveling one light year away from earth would experience on year of life, but on earth a hundred years would have passed - you would travel to your future when you returned, but you cannot go back in time. Think about how long humans have been transmitting high strength TV/radio signals into the Milky Way - less than 100 yrs - so no planets > 100 light years away could hear our signals, and most stars/planets are WAY further from us than that - same thing in reverse - we're too far away from the closest planet with a highly evolved life form to hear their broadcasts.

We have not been visited by ET's unless they've miraculously managed to figure out how to generate worm holes on command.