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Mars bears the scars of five giant impacts, including the ancient giant Borealis basin (top of globe), Hellas (bottom right), and Argyre (bottom left)
Image Courtesy of University of Arizona/LPL/Southwest Research Institute
Caption
Mars bears the scars of five giant impacts, including the ancient giant Borealis basin (top of globe), Hellas (bottom right), and Argyre (bottom left). An SwRI-led team discovered that Mars experienced a 400-million-year lull in impacts between the formation of Borealis and the younger basins.
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Image Courtesy of University of Arizona/LPL/Southwest Research Institute