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<p>to enable 3D structure mapping of the deep interior. On 25 October 2023, scientists, helped by information from InSight, reported that the planet Mars has a <a href="page.php?w=radioactive">radioactive</a> <a href="page.php?w=magma_ocean">magma ocean</a> under its crust.</p>

<p><big> Global physiography </big></p>
<p>Mars has a number of distinct, large-scale surface features that indicate the types of geological processes that have operated on the planet over time. This section introduces several of the larger physiographic regions of Mars. Together,</p><p>
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