The theory that aliens once visited Mars was put forward after strange structures were found on the Red Planet.

Discovered in the 1960s, the Medusae Fossae terrain on Mars raises big questions for scientists about its formation process.

This area includes wavy hills, sharp mountain peaks, polygonal peak structures… stretching over an area of about 2 million square kilometers. It is described by NASA as a mysterious structure of sedimentary erosion.

Because there is no scientific explanation, in 2016, conspiracy theorists said that an unidentified flying object (UFO) from another civilization crashed into the surface of the Red Planet and created Medusae Fossae. .

Analyzing NASA’s photos, YouTube channel UFOvni2012 stated: “If we look closely at the impact site, we can see the shape of a UFO 190m wide, approaching the surface of Mars at a low angle and eating into the ground. “.

“The stretching and turning of the landing mark shows that the spacecraft landed gently” – Scott Waring, a UFO hunter, said.

However, in a study just published in the geographical journal JGR, USA, scientists believe that the formation process of Medusae Fossae probably marks a key milestone in the history of Mars and the climate change of the entire planet. planet.

Accordingly, this strange structure may be the largest volcanic deposit in the Solar System. Some rocks are the remains of massive volcanic eruptions that changed the climate of Mars 3 billion years ago.

Author of UFO Investigation Guide Nigel Watson also confirmed that these traces were probably due to a more natural geological tectonic process.

“This is the largest deposit not only on Mars but also on the scale of the Solar System because we have not yet found any sediment with such a large size” – Lujendra Ojha, a scientist who studies planets at Johns Hopkins University, head of the research team, said.

“The volcanic explosion must have been very large to expel all the water that covered the oceans on Mars by more than 9cm. At the same time, greenhouse gases rising during the eruption warmed the Martian surface just enough for the water remain in a liquid state”.

However, toxic gases such as H2S and SO2 also enter the atmosphere. The research team also used data from spacecraft flying around Mars to measure the density of material in Medusae Fossae and realized that the rock here is unusually porous, only 2/3 as dense as other areas of Mars.