What are the four "mysterious objects" in world history?

Today, the development of human society has gradually revealed the mystery of nature. Before we knew the wisdom of the ancients, we were proud of our achievements. However, we only inherited a small part of the "heritage" left by our predecessors, and most of it has disappeared in the long river of history. Up to now, there are still four "mysterious objects" of unknown origin in the world, which even modern science can't explain, and their origins are still a mystery.

Voynich manuscript is a mysterious book with unknown content. It has 240 pages and illustrations, but the author of this book didn't record it. 19 12 years, the Voynich manuscript was discovered by wilfred Voynich, a rare American bookseller, in the underground of a Jesuit university library near Rome. In addition to strange fonts, there are many pictures about plants, celestial bodies and bathing girls. Voynich was greatly surprised. Based on his many years' experience, he thinks that although this manuscript looks like a reference book for medieval alchemists, it should actually be a cipher book.

In order to solve the secret of this book, Voynich invited the top cryptographer in the world at that time. To his disappointment, cryptographers can't do anything about it, because the words in Voynich's manuscript don't seem to match any known passwords in the world, and no connection has been found between them. It has been more than 100 years since the manuscript was discovered, but no one can decipher the contents of the book.

190 1 year, the navigator found an ancient bronze "machine" in the shipwreck of Antioch Kitera near the Greek island of Antioch Kitera, which was later named "Antioch Kitera Machine". Antioch Kitera machinery has many gears, and there are three marked turntables on the surface. Presumably, it is used to measure the cycle of celestial bodies. It was not until 20 16 that scientists cracked the broken inscription on it, and finally determined that Antioch Kitera machine was used to study astrology, and it was invented before 205 BC, exceeding the similar machine 1000 years.

Delhi Iron Column is located in New Delhi, the capital of India. It is about 7.25 meters high and weighs 6.5 tons. It just stood in the wall of the tall tower, and experienced the wind and rain of 1500 years, but there was no trace of corrosion on it. Scientists are puzzled by this, because even in modern times, there is still no way to prevent iron from rusting, but ancient Indians can do this, which really makes modern people feel ashamed. Scientists speculate that perhaps the phosphorus inside the iron pillar promoted the formation of protective film and isolated the opportunity of corrosion from the beginning, so the iron pillar in Delhi has remained intact.

The last one is "Costa Rica Giant Stone Ball". In the late 1930s, George Chitan, an American, found more than 200 stone balls in the tropical jungle of Costa Rica Delta and nearby hillsides, the largest of which was only tens of meters in diameter. It is puzzling that these stone balls are all made of solid granite, and the curvature of each point on the surface is almost the same, and the diameter error is less than 0.0 1. Even with current technology, it can be done. Were there such sophisticated measuring instruments and craftsmen in ancient India?

In fact, there are still many unsolved mysteries, but we no longer sell ourselves short, because the wisdom of the ancients is really unfathomable.