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NASA Reveals New Discoveries From Mercury Sunday, July 06, 2008 - Ehud Rattner Home >> Headlines >> Space   
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Scientists have argued about the origins of Mercury's smooth plains and the source of its magnetic field for more than 30 years. Now, analyses of data from the January 2008 flyby of the planet by the Mercury Surface, Space Environment, Geochemistry and Ranging spacecraft have shown that volcanoes were involved in plains formation and suggest that its magnetic field is actively produced in the planet's core. (source: nasa.gov)
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