What are the unsolved mysteries in the world?

1, Terracotta Warriors and Horses of Qin Shihuang

When an archaeological team was excavating an ancient tomb in the Spring and Autumn Period, they accidentally found a long sword covered with mud, and a line of ancient seal characters on the sword-"Gou Jian's sword for personal use" jumped into people's eyes.

This major archaeological discovery immediately caused a sensation in the whole country, but even more sensational news came from the scientific research report about Gu Jian. The first thing that caught the researchers' attention was: Why didn't this Gu Jian rust after being buried underground for more than 2,000 years? Why is it still cold and sharp?

2. The Korean passenger plane crashed

1August 1997 10, American federal investigators said that the investigation found that the computer software of the radar system of Guam International Airport failed when the Korean passenger plane crashed, and it failed to give an alarm in time when the plane approached the ground.

National transportation safety board officials in charge of investigating the crash believe that the problem of this radar system cannot be said to be the cause of the crash, but on the one hand, there is a lack of preventive measures. There may be many factors in a plane crash.

In addition, before the plane accident, the navigation system that guided the plane to land at Guam airport stopped for a long time; When the plane approached Guam airport, it was raining heavily in Guam, which were all possible factors for investigators to study the plane accident.

3.the palace of Cleopatra

For more than two thousand years, there must be enough legends and myths about this most charming queen in history. It was not until 1996 that Frank Gao Diao, a marine archaeologist, discovered Khodos Island in Antioch, where Queen Cleopatra sank, in the east port of Alexandria. ?

"Luxurious, unique and colorful", Gaudio described this underwater palace full of the tragic fate of the last Ptolemaic queen.

Gaudio not only found the basalt upper body statues of Cleopatra and Caesar's son Julio, but also found the place where Anthony committed suicide: Anthony was Cleopatra's last lover and husband, and when his arch-enemy W Dawei occupied Alexandria, he might have fled to a narrow peninsula.

4. The city of Atlantis

For more than 2300 years, this legendary city-state has been inspiring human imagination. According to legend, the walls and palaces of Atlantis were all made of gold and sank into the sea in 1 1500 BC.

This myth can be traced back to the ancient Greek philosopher Plato, who first mentioned the city of Atlantis in Clerides and Timaeus. According to Plato, it was the earthquake that sank Atlantis to the bottom of the sea. Plato described this highly developed and wealthy country as "surrounded by separated waters and land"-that is, surrounded by circular canals.

Since then, people who are keen on studying the city of Atlantis have discovered more than 50 possible sites on the earth: in the Atlantic Ocean, in the Black Sea, in the Azores, in santorini and Crete, and even in the German Helgolan Island in the North Sea. People are still looking for it.

5. Mysterious tombstone

1949, archaeologist alberto Lars found a step leading to the tomb on the top platform of the Inscription Temple in palenque. He found a 3.8-meter-long, 2.2-meter-wide slate with mysterious decorative patterns. For 50 years, experts have been arguing about the significance of this model. Did you show a Mayan teenager on the altar?

Is it the man who was avenged by the original troll? Or the grain god who grows corn from his neck and gives birth to new life? The writer erich von Denikenki even saw an astronaut in it. Only one thing is certain: the deceased in palenque's tomb was Pacal, the Mayan Marquis, who died in the 7th century. According to legend, he "exhaled a hot breath" when he died.