According to many documentaries, books, and even experts, the ancient civilizations received their amazing technologies and techniques from the extraterrestrials. However, I believe two other events may have taken place back then. First of all, one reason for the unbelievable advancements and knowledge of the ancients could have been that angelic beings from heaven or demonic beings could have passed on extraordinary and supernatural information from the spiritual realm. Since angelic and demonic beings have inside-knowledge and supernatural intelligence, they could have easily transferred their skills to humans. In fact, there are many angelic visitations documented inside the bible where interaction takes place between supernatural beings and human beings including in the book of Ezekiel and the book of Revelation. Therefore, this could be one example. The second reason could quite obviously be the fact that human beings used far more of their brain capacity back then than we do nowadays. Currently, we use between zero percent and ten percent of our brain capacity. However, back thousands of years ago, when humans did not rely on electronic technologies, as we do now, it is definitely possible that humans used twenty percent, thirty percent, or even forty percent of their brain capacity, which could easily explain for why they were able to perform feats that seem almost impossible to us. Finally, an additional reason is that I believe that many ancient techniques and methods were catastrophically destroyed in natural disasters or manmade-events-of-devastation. For instance, the library of Alexandria once had an extensive collection of ancient texts, records, hieroglyphs, and documents that were ravaged in a massive fire. Furthermore, the Chinese once had an encyclopedia that consisted of 11,000 volumes: Most of this collection of ancient knowledge was burned in a fire too. Moreover, many ships carrying important scrolls have been discovered in the Atlantic Ocean and in the Mediterranean Sea; nevertheless, there could have been many other ships that sank in these bodies of water that have yet to be discovered or never will be discovered. Hence, all of these are reasons and examples as to why the ancients, unexplainably, had techniques and methods that were ahead of their time or at least so we think.