No ones mentioned the other possibility as to why we don't have any confirmed encounters with aliens. What if we're simply ahead of other species? Races like ours are really a diamond in the rough. Other species on other planets would naturally stay in the environment with the least resistance. Thats why we'll never see advances intelligence in the ocean, or in other species. Either the environment doesn't present enough challenges for exterior innovation (tools, clothes), or, the animal or plant itself simply has everything it already needs in its body. When you look at us against all other species, other animals get by by themselves. WE are useless without our accesories. We simply should not have happened. I'm not surprised why there are people in the higher echelons of science that are still skeptical about evolution (though I still think it's time for them to jump on the bandwagon).
Also, evidence of a universe in general is slowly disappearing. Red shift. Find the Scientific American with the title story "End of Cosmology?". Interesting stuff.
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