Recent content by SarahNewton

  1. SarahNewton

    Perseverance Mars rover spots 'shark fin' and 'crab claw' rocks on Red Planet (photo)

    Is there really so little erosion on Mars? We're told Mars hasn't been geologically active for billions of years, yet rocks like these have sharp edges and look like they've been calved relatively recently in geological terms. What gives?
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