Earth was born 4.5 billion years ago. With such a long history, there are many mysteries in the past that we still cannot find.

Modern humans appeared 200,000 years ago, but have only become extremely developed 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.

1. Giant bird mummy

The Moa bird is a giant bird of New Zealand. They cannot fly, and are thought to have gone extinct 1,500 years ago because of excessive hunting by the Mãori people.

But in the 20th century, science suddenly discovered something that no one could explain. It was a giant set of claws from a Moa bird, which somehow had been preserved extremely perfectly over the centuries.

2. Saksaywaman Temple, Peru

The Saksaywaman temple complex is still a mystery to science. This temple is built of stone, arranged so perfectly that it does not need a drop of mortar to still stand firm over time. Furthermore, each stone has a smooth surface, well-honed, and rounded corners.

How this temple was built, no one knows yet.

3. Sun Gate, Bolivia

The Sun Gate is located in Tiwanaku – an ancient city in Bolivia. Archaeologists believe that this gate was built in the first century AD, as the center of a huge empire. However, the reason why the ancients made this door is still unclear to science, although there is a hypothesis that it is related to astrological or astronomical activities.

4. Unfinished tower in Egypt

This is a pen-shaped tower (obelisk), found in Egypt. According to archaeologists, this tower was carved from a large block of stone, but was cracked during the process.

In the end, the ancient Egyptians left the tower in its original state, forever unfinished, and no one would ever understand the purpose of its creation.

5. The submerged city of Yonaguni, Japan

The ancient city of Yonaguni was accidentally discovered during an expedition by Kihachiro Aratake – a scuba diving instructor.

The origin and meaning of this city has puzzled science for a very long time. The rocks that make up this city appear to have been submerged 10,000 years ago – that is, long before the Egyptians created the first pyramids.

The problem is that according to scientific knowledge, during that time, humans still lived in caves, lived on wild vegetables, and could not even hunt. They certainly couldn’t have built an entire city out of such stone, so the origin of this city still makes science difficult to understand.

6. Land of the Dead, Pakistan

Mohenjo-daro (land of the dead) is an ancient city in Pakistan, and its collapse has puzzled scientists for decades.

In 1922, Indian archaeologist RD Banerji discovered the ruins of this city on an island in the Indus River. The question is why did it collapse? What about the people who used to live here? Many explorations have been carried out, but no one has yet found the answer.

7. Archaeological site in Canada – Was Columbus the one who discovered America?

The L’Anse aux Meadows archaeological site was determined to have been created by Vikings thousands of years ago. The problem is that it means Scandinavians (Northern Europe) discovered America thousands of years before Christopher Columbus was born.

8. Longyou Cave, China

These caves are a system of large artificial cave complexes made of sandstone, created by human hands. And such a difficult job will require the participation of thousands of people. However, there is not a single mention of these caves, or the methods used to construct them, anywhere in the historical records.

9. Stone Age tunnel

The discovery of a vast network of underground tunnels, stretching across Europe from Scotland to Türkiye, shows that Stone Age communities were not simply hunter-gatherers. But the true purpose of the tunnels remains a mystery. Some researchers believe they were used as defense systems to fend off predators, while others believe it provided a way to travel around safely, helping people of the time escape. from harsh weather and conflicts.