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Why is the planet Mars red?

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It all started 4.5 billion years ago. When the solar system formed, many of the planets landed a dose of iron. read more

The red colour we see in images of Mars is the result of iron rusting. Rocks and soil on the surface of Mars contained a dust composed mostly of iron and small amounts of other elements such as chlorine and sulhpur. The rocks and soil were eroded by wind and the dust was blown across the surface by ancient volcanoes. read more

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