Obvious marine propeller in Mars image, see if you can find it:
Notice how the Mars picture you provided contains no propeller at all
. And how it's hard to strain your eyes enough even to imagine
Notice how the following picture actually contains something so obvious that it doesn't need to be named. That's how it's done.
(I do however, appreciate that wonderful picture of Mars you provided. Even if it doesn't have any propellers in it. Thanks