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Layered rocks near Mount Sharp on Mars. (Credit: NASA, JPL-Caltech, MSSS) At a Glance A group of scientists discovered that molten rock on Mars resembles boiling toothpaste under certain conditions.The findings could affect how geographical studies are conducted on Mars. A group of scientists discovered that molten rock on Mars resembles boiling toothpaste under certain conditions. According to the team, the findings could affect how geographical studies are conducted on Mars. The study, published this month focuses on Martian volcanoes...