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Piece2

This image is a part of the Image of the week, a photo acquired by the Perseverance rover's Mastcam-Z camera and selected by public vote.
To me it seems like a piece of styrofoam and with a closer look one can see the regularly spaced spots on it, which spots I think can only be man-made.

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    $\begingroup$ A comment since it does not describe the dots, but Perserverance twitter account says it is foil from the descent stage twitter.com/NASAPersevere/status/… $\endgroup$ Jun 23 at 11:29
  • $\begingroup$ @GremlinWranger Nevertheless a clarifying answer, thank you ! $\endgroup$
    – Cornelis
    Jun 23 at 11:47
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    $\begingroup$ "NASA finds debris from alien spacecraft" $\endgroup$ Jun 23 at 11:51
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    $\begingroup$ @GremlinWranger One of the replies includes a photo of different material samples: twitter.com/NASAPersevere/status/1537120586081521664/photo/2 Unfortunately it's a little small so I couldn't read the labels, but the dots appear on some of the materials there. $\endgroup$
    – Cadence
    Jun 23 at 12:54
  • $\begingroup$ My unsourced supposition is that it is insulation with two layers, and the dots are where the layers are joined. $\endgroup$ Jun 23 at 13:24

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The material is likely part of the Mars 2020 descent stage's thermal insulation "blanket". The spots are holes that are critical for equalizing/venting the pressure inside and outside of the spacecraft during launch.

Source: Mars Guy - Perseverance spots unexpected intruder in Mars rock

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