Found a giant cave 'by digging monsters' in Brazil

More than 1,500 giant tunnels have been discovered, causing experts to ask questions about prehistoric monsters.

The northern wilderness of South America is not only the "territory" of Manchineel - the most dangerous tree in the world, but there are hundreds of huge tunnels that people can go to. comfortable again.

Giant tunnels were discovered in North South America.

These tunnels are not made by humans, nor are the products of any geological transformation process known. The traces of giant claws around walls and ceilings are the remaining evidence so that one can find answers about their formation.

Through the investigation and research process, geologists believe that these large-scale tunnels are made by an extinct ancient sloth species and called them "ancient tunnels".

The term "ancient tunnel" was developed by Professor Heinrich Frank at the University of Federal University of Rio Grande do Sul in Brazil when he found a similar tunnel in the construction site in Novo Hamburgo town at the beginning of the 2000.

Later, he and his colleagues scientific researchers continued to discover more than 1,500 other tunnels only in Rio Grande do Sul, including some hundreds of meters deep and divided into many different branches.

The large tunnel is up to 610m long, 1.8m high and 1-1.5m wide. It is estimated that up to 4,000 tons of soil and rock can be dug to form such a tunnel.

In these tunnels there are many traces created by the giant animal's claws.

According to Professor Frank, these massive ancient tunnels are made up of a giant earth lazy species whose size is about the size of elephants today.

This ancient sloth species once lived in South America about 10,000 years ago, which is considered to be the largest mammal in the world that surpasses the size of mammoths.

However, there are other ideas that suggest that the extinct ancient armadillos , also known as the tatu - a hard shell reptile - are the authors of these giant tunnels.

The question of the origin of these mysterious tunnels has not been clarified yet, there are bigger questions.