What's the 3 things we've been doing since we achieved space flight?
1. Launch
2. Orbit
3. Land
Launch, orbit, land. Launch, orbit, land.
That's it. That's all we do. And for the most part, we're pretty good at it.
Now it's safe to assume that is the same process of any alien species that wants to explore space.
Launch, orbit, land.
What is hard, what we have yet to figure out is travel at near or at the speed of light. That is a requirement to travel beyond our solar system. We have guesses of what it might take but no real understanding of how to create it or even use it.
The entire UFO theory is based on aliens having the technology and ability to travel to our very lonely part of space but suddenly they fuck up the easiest part of the entire deal, the orbit and land.
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How is it that all alien technology that people have claimed to see is the same technology that was shown in movies, serials, and books like Buck Rodgers? We can't even predict what tech is going to be in use 10-20 years from now but some how scifi writers in the 1920s, 30s, and 40s, correctly predicted the technology that aliens would be using?
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Power
The more the advance in technology the more power is required to use it. If any of that were true, there would be either a nuclear power plant at Area 51 or more power lines into the place then anywhere else on the planet. And yes, I know there are claims that all of this magical alien equipment is self powered but we would still need power to understand it, monitor it, and try to recreate it. The power lines into Area 51 are large but standard for a base that is testing top secret aircraft.