When the European Space Agency (ESA) was searching for life on Mars, it discovered something quite amazing in images from the planet.

In images taken from one of the organization's Mars Express satellites, something resembling several spiders suddenly appeared. In the so-called “Inca City” on Mars.

Now the organization has finally found an answer to the cause of the mysterious phenomenon on Mars, which was first photographed in 2016.

Extraterrestrial phenomenon

in press release The European Space Agency reveals the mysterious phenomenon behind “spiders”. These forms occur when the spring sun shines on carbon dioxide deposited by Mars in the winter months. The sun causes ice made of carbon dioxide to turn into gas.

Read also: New giant tunnel could provide unique space answers

The gas escapes through cracks in the ice sheet, which can be up to a meter thick, as a geyser-like explosion and settles on the ground. The gas then settles with dust particles on the surface.

Giant spiders appear on the surface of Mars, beneath this meter-thick layer of carbon dioxide ice.

The carbon dioxide process that forms the “spiders” is a completely extraterrestrial phenomenon, says Meg Schwamb, an astronomer at Queen's University Belfast. daily Mail .

Read also: New images of galaxies from the Webb Telescope are causing a stir

The mysterious “spiders” can be up to a kilometer in diameter, and can be seen all over Mars, but especially on the outskirts of the “Inca City” on Mars.

Mysterious ruins

As for “spiders,” the famous landmark “Inca City” on the fourth planet in the solar system is approaching.

Already in 1972, NASA discovered some strange structures on the surface of Mars. Something that almost resembles the ruins of the ancient Inca Empire in South America, due to the almost linear and geometric network of hills.

Read also: UFO fever in the USA and Mexico

The European Space Agency believes that these hills are almost similar to Inca ruins, such as the famous city of Machu Picchu in Peru.

How these formations emerged is still a big mystery to the space agency, which gave the city the nickname “City of the Incas” or “Labyrinth of Angustus.” The common theory is that they are sand dunes that turned to stone over time. Another theory is that a substance such as magma or sand seeped through the rocks.