Theorists believe that ice deposits in the mid-latitudes of Mars formed after the melting of its polar caps in
a time when the planet's axis was highly tilted. We have determined that this process left traces of canyons and other signs of erosion at the North Pole of Mars. Alexis Rodriguez, senior scientist at the Planetary Science Institute in Tucson in the USA
Scientists have concluded that the climate on Marschanged dramatically after they studied the history of the formation of giant canyons at the North Pole. They discovered that the spiral pattern consists of many individual segments that arose at different times and are connected to each other in special ways.
Unlike Earth, the ice store on Mars is located only at the planet's South Pole and is composed of frozen water and carbon dioxide.
The authors of the new work suggest that suchdeposits were also at the North Pole of the planet, but due to the change in climate, the ice cap melted. Deep groove-canyons remained traces of this.
Presumably, such sudden changes are associatedwith changes in the angle of inclination of its orbit. This is also indicated by some other unusual landforms on Mars, including recently discovered traces of water movement along the slopes of the Istok crater.
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