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Congress decided to spend some time figuring out whether intelligent life exists elsewhere in the universe, and they learned that yes, it does. Two top astronomers, Dan Werthimer from the University of California and Seth Shostak of the SETI Institute, testified before congress there is a near 100 percent certainty aliens exist. Intelligent life existing in Congress, however, is less likely.
originally posted by: JohnTheSmith
The Drake equation is a probabilistic argument used to estimate the number of active, communicative extraterrestrial civilizations in the Milky Way galaxy.
You can use this site to enter your variables and it will calculate it for you.
Even lowballing the values, as I just did, yielded me 45,000 communicating civilizations in the galaxy. Just our galaxy, the Milky Way. The most current estimates guess that there are 100 to 200 billion galaxies in the Universe, each of which has hundreds of billions of stars. A recent German supercomputer simulation put that number even higher: 500 billion. In other words, there could be a galaxy out there for every star in the Milky Way.
Couple that with:
"There are only so many ways matter can arrange itself within that infinite universe. Eventually, matter has to repeat itself and arrange itself in similar ways. So if the universe is infinitely large, it is also home to infinite parallel universes."
I love thinking about multiverses... and the obvious fact (still my opinion I guess) we cannot be alone.
there is no evidence for abiogenesis occurring more than once on the Earth —that is, all terrestrial life stems from a common origin. If abiogenesis were more common it would be speculated to have occurred more than once on the Earth. Scientists have searched for this by looking for bacteria that are unrelated to other life on Earth, but none have been found yet. It is also possible that life arose more than once, but that other branches were out-competed, or died in mass extinctions, or were lost in other ways. Biochemists Francis Crick and Leslie Orgel laid special emphasis on this uncertainty: "At the moment we have no means at all of knowing" whether we are "likely to be alone in the galaxy (Universe)" or whether "the galaxy may be pullulating with life of many different forms."
originally posted by: Aleister
a reply to: EnigmaAgent
Well, to play devil's advocate or water bearer (depending on the culture), the two scientists were appearing before Congress in order to obtain more funding and keep their children clothed and eating. So they do have a bias in favor of "sure, life abounds, and if you give us another funding cycle we may just find it for ya!"
originally posted by: Thecakeisalie
If you forget the science for a moment and look at math, the odds are in overwhelming favor for the existence of alien life, almost to the point of certainty.
Let's take what we know already; we exist so the odds are better than zero. And even if our sun is only one in a ten billion that harbors a planet that can support life, that means that at least ten extraterrestrial civilizations could inhabit our galaxy alone, and there are tens of thousands of galaxies...
I believe that there are thousands of civilizations out there, but the sheer distance between stars and galaxies means we'll never meet most of them.
we can sit around and have a lot of drinks and talk about it but in the end, if you don't do the experiment, you'll just continue to have the drinks...
originally posted by: SonoftheSun
In the same line of thought, I fully disagree with Stephen Hawkin's point of view on the matter.