Just a weird idea

I pretty much follow Mars very frequently, specially the Mars Rover pictures.
Doing this I always come across oddities. Some make rumors of that, others start conspiracies or last but not least proove that live in fact does exist on Mars.

I just want to make fun of it.


Lets give it a start:

SO ROCK!!!

Actually the above is contrast enhanced, the original can be found at mars.jpl.nasa.gov. Some may read it as 50, SC may be an option as well, but neither of these did harmonize with rock.

So why is there graffity on Mars?  

Did the Curiosity team shoot this onto the rock using their Chemcam laser?

Is this the number of an ancient Marsian house that does not exist anymore? 

Is it Martian hyroglyphes we cant decipher? 

Speculate and let me know. 

If you'd ask me; I am sure this is an ancient Roman roadsign and we may find more Roman traces as we go along.