One of the more popular theories now is that the building blocks for life as we know it on this planet were deposited billions of years ago by meteors. They have found microbes that can survive being frozen in the vacuum of space. They don't die. They just freeze in hibernation, then reanimate when they warm up. Many scientists believe that RNA and DNA were deposited on earth this way. No telling where they came from. This may not be the ONLY way that life started on earth, but they believe it could be and/or supplemented the life generation process here.
As for UFOs... I'm a big-jet transoceanic pilot. I'm up looking at the stars at all times of the evening and have a great view. I've NEVER seen anything that I haven't been able to explain. I BELIEVE there is life out there somewhere, but... SteyrAUG nails it imho.
That. Now factor the age of the universe, it's possible that other civilizations have come and gone extinct. There may have been, and may will be many more intelligent creatures out there. Stars blow up, planets die. Beings on said planets that get wiped clean in a super nova... Next consider the SIZE of the known universe and the distance between celestial systems. There could be thousands of intelligent races in our own galaxy with our intelligence and we won't know. They are too far away. The universe is huge. Even if there was a trans warp capable civilization out there, the offs of them FINDING us are almost nil. It would have to happen almost by accident.
But but but... What about our radio and TV signals??? Don't read this unless you want to be depressed. They are being washed out by the background noise of our star. Someone would have to be less than a light year or two away from us at the most to be able to detect our electronic signature. Think of a candle in front of a nuclear bomb. If you look at the bomb flash from a few thousand miles away, the candle light will be undetectable. Same theory. Even if detectable, it could take thousands or even millions for said signals to reach another civilization. So, E.T. would LITERALLY have to be walking through the front door to even know the house was occupied. Edited... This works BOTH ways. There could be thousands of other civilizations with radio and TV. Their star will drown out their signals the same way that our star does... We really may NEVER know.
Yes, they're out there. I'm not sure we'll know for certain within the next few hundred or thousand years. I'm guessing a few hundred. Now ask ourselves, do we want to be found? If a trans warp capable civilization found us, it would be like us discovering some new type of ant colony. What if the visitors are not nice?
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