In nature, humans are still very small, and some unexpected things will always occur in the magical continent. A tunnel is a building that we can see everywhere now, but we all know that the construction of a tunnel is very complicated and cannot be repaired without certain techn

In nature, humans are still very small, and there will always be some unexpected things in the magical continent. A tunnel is a building that we can see everywhere now, but we all know that the construction of a tunnel is very complicated and cannot be repaired without certain technology. However, there were tunnels in ancient times. Have you seen the tunnels before 13,000? There is such a tunnel in Brazil . The tunnel is ten meters long, two meters high, and four meters wide!

This tunnel is a number of mysterious caves discovered by Brazilian scientists in the early stages of southern and southeastern Brazil from 2005 to 2016. These caves are located in weathered granite, basalt areas, and some are also located in sandstone or other sedimentary rock structures. There are thousands of them in total. There are traces of excavation inside the cave, and there are too many. The time of formation of these tunnels was even more frightening. After detecting and analyzing the rocks and various sediments in the tunnel, it was inferred that the construction date of the tunnel was about 10,000 to 13,000 years ago.

This sounds outrageous. In 2010, geologist Amilcar Adamy went to the place to see if the caves were so magical. After

to the destination, after preliminary exploration, Amilcar Adamy got some important news, that is, it was not caused by geological phenomena. In other words, this is not naturally generated, but artificially created. The reason is that the entrance to this cave is very smooth. Looking out from the cave, the space inside is also very large, very regular, and it is divided into many roads. The overall length of these branches is more than 600 meters, more than 2.5 meters high and more than three meters wide.

But the scale of this cave surprised Amilcar Adamy. Standing inside, it was like an ancient man dug out a cave to live in. Over time, this feeling will become clearer. This is by no means a natural formation. Such a fine structure cannot be a cave. Amilcar Adamy walked through several tunnels himself, walked from one end of the tunnel to the other end of the tunnel, and made a rough measurement. There were hundreds of meters of space between these tunnels and many small rooms.

Is it really dug up by people from ancient times? In primitive society, without any advanced technology or tools, can primitive people dig out so many caves? In the 1930s, some archaeologists said that these cave groups were dug by humans who lived near the Amazon basin at that time, but what did they do to dig such a large tunnel? Is it just to hide from the rain? A tunnel like

must have been built by prehistoric civilization . Why hasn't it been mentioned in the official report? This is the proof of prehistoric civilizations. What is the purpose of digging tunnels? With their advanced civilization, how could it disappear in more than 10,000 years?

If you look closely, you will find that there are some dense and obvious gullies on the inside of the tunnel. These gullies should be grouped in two or three, and it looks like they were dug out bit by bit with tools such as three-claw steel brazing.

Simply put, it is like a tool used by humans to dig soil. Every time they plow down, they will leave three to four different claw marks on the ground. Geologist Amilcar Adamy discovered this miracle. More than 10,000 years ago, prehistoric human had already made such an iron tool? Moreover, based on these data, scientists estimate that it is very labor-intensive to dig more than 4,000 tons of soil and rocks.

According to common sense, this is absolutely impossible.

So, Amilcar Adamy went to Heinrich Frank with questions, and together they discovered a larger tunnel.Their team discussed it. Some people thought it was made by a prehistoric land otter in South America. The three claw marks were exactly three fingers. This was indeed very appropriate to the excavation mark. Didn’t the answer be revealed? But what's the use of a land otter digging a hole?

In fact, this is also necessary, because between the Pliocene and the Pleistocene, it was an ice age. At this time, the temperature on the earth will be relatively high, while in the south of Brazil, winter will be very cold, so it must spend the winter in this cave!

earth otter is a prehistoric giant otter that lived between the Pliocene and the Pleistocene. It is 6 meters long and weighs 4 tons. Its bones are thick and its curved claws are very sharp. The sharp claws of the earth otter are the best tool for digging. At the same time, its claws also have a certain amount of restoration, just like "iron claws", it can be called a magical object.

The big land otter also has a powerful tail, which can stand very steadily. Paleontologists believe that the big land otter can even walk on two legs.

In the long history, there are many species of organisms on the earth, including some species that we cannot predict, such as those large mammals. The traces they leave often make people feel illusioned. These prehistoric caves may have sheltered land otters, but due to their lack of food, they cannot escape the fate of extinction.