Coin left behind on Mars?

Wow this thread got revived from 2008?
I remember this it was an interesting picture, but a coin is a bit of a stretch, considering it could as easily be a round mark in the dirt left by a rover track, a piece of the rover etc, definitely hard to determine for sure.

BTW when did ArMaP become a MOD??? Did I miss something, have I really been absent from the site that long???

[edit on 1/7/2010 by AlienCarnage]

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[edit on 1/7/2010 by AlienCarnage]

A coin?
Isn't that a cliff side for gods sake...
What is the size of the actual area being photographed?

Anyways a perfect circular shape eroded into the cliff is wierd indeed. Just like the faces on mars, which most definately was made by someone or some thing.

what if venus was earth before earth and what if mars is what earth is in the future? what if there's a time paradox? ...oooo ..weeee.. oooo...