During the spring and summer times of mars parts of it ice caps in the south pole begin to melt. This happens because of the warm weather the planet is going through now causes some of the carbon dioxide to evaporate, creating these dry ice pits. In the picture it appears as if the ice pits are coverd in gold but this is actually dust. We have not yet fully discovered the complete composition of this substance. This is a cycle as mars completes one revolution around the sun. If we one day do reach mars astronauts will try to collect samples of these ice caps and therefore try to understand mar's composition better.
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