Possible Alien Artifacts in the King's Valley, Libya Montes, Mars
The Journal of Space Exploration actually published an article to support alien structures on Mars. I have heard this theory before, but this is from an actual scientific paper.
Read the entire paper at the link.
Conclusions
The King’s Valley was probably next to a paleosea that lasted for close to a billion years. It is in an area considered to be a plausiblelocation for Martian life to have existed. This are would have experienced many cycles of rain and a water table or groundwater connected to the paleosea. There have been suggestions of stromatolite fossils and microbial mats have been observed by the Roversnearby in Gale Crater [4] according to Bontemps [19]. This could have been food for the five-possible species of fish on the King’sValley wall. In turn this can represent a food chain for life that was intelligent enough to build these simple structures before goingextinct. It then depends on whether this paleosea existed for long enough and whether Martian life could have evolved quicklyenough before the planet cooled. Some chance mutations in a high radiation environment may have caused accelerated evolutionto occur. Alternatively, Mars could have been terraformed by visiting aliens of an AI probe as explored in [4]. By creating TharsisMontes and Elysium Mons this would have caused these paleoseas to form. Much of this is speculation but is based on the geologicalevidence generally accepted.
The formations over and over portray crowned faces and Figures in different poses and expressions rather than other possible shapes. This represents low entropy and low degrees of freedom, each time the similarities repeat they could have been something recognizable yet very different. This is not how pareidolia works, we might see something we recognize as a face but not as the same kind of face over and over. In the author’s opinion, there is simply too much evidence in the King’s Valley for a natural explanationto be credible.