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Originally posted by Bibliophile
Frankly, if I was an alien, this is the last place I would land. It is polluted, overpopulated, undereducated, and the inhabitants murder animals and each other under the slimmest of pretenses.
Planet Earth would not earn a tick even as a place to stop and use the biffy.
Originally posted by kojac
Having recently spent more time talking to people and researching the topic of extraterrestrial life, I came across a theory which has got me thinking.
This theory has cast a shadow of doubt upon my previous unshakable belief that through the sheer weight of numbers, there has to be a multitude of life in our universe.
For those unfamiliar with the Fermi Paradox, here is an brief extract..
The age of the universe and its vast number of stars seem to suggest that extraterrestrial life should be common. Considering this with colleagues over lunch in 1950, the physicist Enrico Fermi is said to have asked: "Where are they?" If there are a multitude of advanced extraterrestrial civilizations in the Milky Way galaxy then why have we not seen any evidence, such as probes, spacecraft or radio transmissions? The simple question "Where are they?" (alternatively, "Where is everybody?") is possibly apocryphal but Fermi is widely credited with simplifying and clarifying the problem of the probability of extraterrestrial life.
For me, this theory has presented some interesting questions. Humans could theoretically colonize the galaxy in a million years or so, and if they could, astronauts from older civilizations could do the same. So why havn't they come to earth?
If there are a multitude of advanced extraterrestrial civilizations in the Milky Way galaxy then why have we not seen any evidence, such as probes, spacecraft or radio transmissions?
As of 2006, the observable universe is thought to contain about 7 × 1022 stars, organized in about 100 billion (1011) galaxies
posted by neformore
In a universe as vast as that which we can observe currently, the definition of "commonplace" is misleading. According to Wikipedia as of 2006, the observable universe is thought to contain about 7 × 10~22 stars, organized in about 100 billion (10~11) galaxies . . if only one civilization develops per galaxy, that’s 100 billion civilizations, which is an awful lot of aliens . . the first galaxies formed 15.8 billion light years ago . . the chance is if someone is out there we'll never, ever see them . . I personally believe someone or something dropped by about 5,000 years ago, [Edited by Don W]
I don't know that it's a paradox, per se, but the question has been answered many times.
If all solar systems are like remote islands, then why should we see an advanced species. Even if there are millions of such species, there would be billions of solar systems, with many hundreds of thousands inhabitable by any one. Why come to this island? Why travel? Why think in terms of space and distance so as to think about moving through space? These are all assumptions we make.
WE are the aliens.
It would suck if when humans finally try to colonize another system there is a big alien ship ready to stop us
Considering the time needed to evolve without a mass extinction...
Originally posted by Scramjet76
Yes it is a paradox. Defining the problem as a paradox is at least recognized within scientific types who have an interest in the UFO phenomenon.
But I don't think we can claim to have a clue as to what the value should be