Earth was born 4.5 billion years ago. With such a long history, there are so many mysteries in the past that we still cannot find.
Modern humans date back 200,000 years, but have only grown tremendously in the last few hundred years. With such a long history, there are many relics and antiques found by archaeologists but science has no way to explain their existence.
The Moa bird is a giant bird of New Zealand. They could not fly, and were thought to be extinct 1500 years ago due to excessive hunting by the Māori.
But by the 20th century, science suddenly found something that no one could explain. It is a giant claw of a Moa bird, which somehow has been perfectly preserved over the centuries.
The Saksaywaman temple complex is still a mystery to science. The temple is built of stone, so perfectly arranged that it doesn't require a drop of mortar to remain standing over time. Moreover, each stone has a smooth surface, honed, honed, rounded corners.
The process of building this temple is like, still unknown.
The Sun Gate is located in Tiwanaku - the old city in Bolivia. Archaeologists believe that this gate was built in the first century AD, being the center of a huge empire. However, the reason why the ancients made this door is still unclear science, despite the theory that it is related to astrological or astronomical activities.
This is a pen-shaped tower (pen-obelisk), found in Egypt. According to archaeologists, this tower was carved from a large block of stone, but was cracked during the process.
After all, the ancient Egyptians left the tower in such a condition, forever incomplete, and forever no one understood the purpose of creating it.
The ancient city of Yonaguni was accidentally discovered on an expedition by Kihachiro Aratake - a diving instructor.
The origin and meaning of this city has caused science headaches for a very long time. The rocks that made this city seem to have been submerged 10,000 years ago - that was long before the Egyptians created the first pyramid.
The problem is that according to scientific knowledge, during that time, humans were still living in caves, living on wild vegetables but not even able to hunt. They certainly couldn't build a stone city like that, so its origins still make science difficult to understand.
Mohenjo-daro (land of the dead) is an ancient city of Pakistan, and its collapse has baffled scientists for decades.
In 1922, Indian archaeologist RD Banerji discovered the ruins of this city on an island in the Indus River. The problem is why does it collapse? What about the people who used to live here? Many expeditions have been made, but no one has yet found an answer.
The archaeological site of L'Anse aux Meadows was determined by the Vikings thousands of years ago. The problem is that the Scandinavian (North European) people have found the Americas before Christopher Columbus was born a thousand years.