Mud volcanoes on Mars could be the cause of distinctive features that most researchers had thought were left over from ancient lava flows. Tens of thousands of channels spread out over the Martian surface. Hundreds of kilometers long, and tens of miles wide, these ribbon canyons reach far across the ruddy landscape of Mars. Planetary science suggests these features were carved out as massive floods, comparable in size to the largest ever seen on Earth, tore across the surface of Mars long ago. As the water settled into the Martian crust, it (naturally) formed mud. Rapid freezing could have led…

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