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A photograph taken by NASA's Mars Reconnaissance Orbiter spacecraft surprised thousands by showing how the particular "spiders" on the surface of Mars began to emerge.
The image taken on May 13 corresponds to the South Pole during Martian winter and exposes the red planet covered with a layer of carbon dioxide ice.
With the heat of the sun and the arrival of spring, On the surface of March mounds appear which resemble these arthropods and form after heating and releasing the CO2 that was' trapped, "explains NASA . (Photo: NASA )
This is an active seasonal process that is not visible on Earth. Like dry ice on our planet, carbon dioxide ice Mars sublimates when it heats up (going from solid to gas) and the gas is trapped beneath the surface.
Over time, trapped carbon dioxide accumulates under pressure and is finally strong enough to break the ice like a jet of dust. The gas is released into the atmosphere and darker dust can settle around the vent or be carried by the winds to produce streaks. The loss of sublimed carbon dioxide leaves behind those characteristics similar to those of surface-etched spiders, said the US government agency on its website
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