I like to write articles on various artifacts that may not fit into the usual history, but may indicate an ancient civilization that possessed many technologies. It is clear that it is quite difficult to prove the reality of modern technologies in ancient times, and the whole problem lies in the exact technology for determining the age of finds.
For example, I previously wrote about a hammer in petrified rock that is over 400 million years old, but does that mean the hammer is the same age? Probably, not. But these finds raise many questions, and among them are pipes from China, which were found in 1996.
An amazing find from a network of pipes was found in a cave of Mount Baigong and pipes stretch to the nearest lake. Could the ancient people have created something similar, or is it just another mistake in dating? Scientists examined these pipes and it turned out that they are radioactive, although the radiation level exceeds the permissible level slightly.
If you believe the scientists, then similar technologies appeared in China about thirty thousand years ago, but not 150 thousand, so how to explain this find then? Some scientists have found arguments and explains this by the fact that these are not pipes at all, but the roots of trees, but there is a very big problem in the explanation.
The thing is, trees could not grow in caves and such arguments do not sound very convincing. Where did the radiation come from? If we imagine that our ancestors learned similar manufacturing technologies hundreds of thousands of years ago, then they could not work with radioactive metal? So far there is no clear answer about this find and scientists are only building different versions.