Tracks of typography on Mars ?

Perhaps not the best place, sorry ! It's because these minerals does look like punches :-)

Please don't hesitate to guide me if I fail.  

Thanks ! That was the right thing to do. I searched how to change it by myself after Ramiro's comment but I didn't find how to do.
And I must add that I have the deepest respect to punch cutters and all other craftsmen. I hope none of them were hurted by my post.

@André G. Isaak Interesting ! Could you reveal your sources ?

Do you mean that Nazca lines are prints ?

@Theunis de Jong Of course you are right. And this is the explanation why people stopped to use this printer a long time ago there : every time it caused earthquakes in this very unstable region.