In 1900 a petrified metal was found around 2000 years old in a shipwreck on the Greek Antikythera island, and 50 years later the object was seen with X-rays and found that it was a mechanical device like a mechanical watch, and this discovery make archeology experts confused, because at that time the Greeks would not be able to make mechanical objects that complex.
It is very unique and does not enter so that experts believe that this world has experienced progress and destruction may be caused by floods or earthquake disasters so that all of them disappear in an instant and we can only find thousands of kinds of evidence and very unusual.