Mars, the mysterious Red Planet, looks quite colorful, and the hue of a particular area depends on the minerals that make up the soil. The ground there is covered with fine dust, and the same orange dust is in the air. The planet's surface is rocky, covered with craters and volcanoes, old dry lake beds, and canyons. Recently, scientists found something extraordinary there - winding channels that look like veins run through the "eyeball." It's a giant crater almost 19 miles across! 

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