I do not believe that these sites were built by the aliens. Maybe the humans during those times had their own tools that were as perfect as the ones we have today.
The reason why most of us doubt that these sites were indeed built by humans was that we want to think that we are technologically advanced than those ancient people.
Just because the stone has a precise cut and the holes were at an equal distance doesn’t mean that these were built by aliens.
There are many such places around the world that are too perfect to be believed, I do believe aliens exists but I do not believe that these places were built by the aliens.
If you're right and these were built by humans with advanced technology, where did it come from?
There is no evidence of chronological development up to that point of advancement. Therefore either many thousands of years of history has been destroyed as it couldn't have happened overnight if it was natural evolution or they were given the technology by someone else advanced. Either way we have an intriguing mystery yet to be explained.
I did not say they had the technology, I did say that they might have had the tools that made the perfect cuts.
If aliens were on earth then where are they now? And why isn’t there any solid proof of their existence? Why don’t we find any of their skulls buried or in amber, and more importantly why don’t I have alien cousins? Lol.
We all know that a lot of knowledge has been lost, civilizations were destroyed in rain, floods, and earthquakes.
Growing up in India, I have seen many temples which look as if they were designed and built by aliens, but no, all of these temples were built by humans. Some temples even took more than a hundred years to build, and there are many which are carved out of single piece of rock/mountain.
All all of these were built with simple tools.