Other newer ones include something that it is being suggested is like a Mayan statue, and even remains of buildings and a crashed UFO.
Some people are convinced by them.
Scott C Waring, editor of UFOsightings daily wrote on his website: "The carvings do look very similar to ancient Egyptian carvings.
"This is a monumental discovery, one that archeologists around the world should be taking a closer look at.
"A written language from another planet, its the final straw that will reveal disclosure. This is what we need to find more of."
But Nasa says although the rover has found evidence of water flows on the surface of mars - one of the requirements for life to start - there has been no evidence yet of any life being present on the Red Planet.