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Originally posted by dbates
The difficulty of life existing on another planet in the Galaxy is very high. They would need a solar system with a planet in a fixed orbit that wasn't elliptical so the temperatures would be stable. The planet would need to spin at a rate that wasn't too slow or too fast. The star in the system would need to be stable and give off the correct spectrum of light. The planet would need to be the proper distance from the star. It would also seem to be a necessity that the solar system would have several other larger planets to help clean up random debris (comets, asteroids) that could wipe out life.
Originally posted by SaosinEngaged
Hear me out:
I honestly don't think we, humanity, give ourselves enough credit. I mean we have personal transport machines (cars), personal global communicators (cell phones), anti gravity travel machines (planes), personal computing devices (laptops, tablets, smartphones), and many more instances of "high-tech" things we constantly take for granted.
Originally posted by CHA0S
I used to believe very firmly that we were the most intelligent species in the Milky Way, and perhaps even the Universe...I could see no valid proof of Alien visitation, I could see no scientists backing up the theory that intelligent life has visited Earth, and possibly still is...but that was before I did any real research into the topic...I've been casually studying the subject for several years now, and I'm beyond the point of even needing to see an Alien for myself...I couldn't possibly confirm my suspicions any more if I tried...there is at least one species of extraterrestrial intelligent life that has, and probably still is visiting Earth for reasons I'm still trying to piece together...
[edit on 12/7/10 by CHA0S]
Well, assuming they didn't come from a planet within our own olar system...yes, they would have to be more intelligent...and even if they did come from a planet within our solar system, there's an extremely high chance they're more intelligent than us because they've managed to go unnoticed for a very long time, and most of the planets and orbiting satellites in our solar system don't seem very habitable to me, they'd obviously need some sort of advanced artificial structure to live within, unless they evolved on that planet...but either way they seem to get around the solar system a lot more than us, and their crafts are obviously more advanced than ours because according to everything I've learned they make maneuvers and travel at speeds far greater than any man made craft is capable is.
They don't need to of visited Earth to be more intelligent, heck even if they've achieved space flight and colonized their own system. Which we haven't done.