That's a tautology: any evidence of Mars civilization has to be a hoax because no Mars civilization evidence (which isn't a hoax) has ever been found.kell1990 wrote: My present guess is that this is a hoax, because no Mars civilization has ever been found.
Other views on the Medusa Fossae area:
http://www.cdmbs.com/simple/?t699.html
http://929bn.dk/
If this stuff is a hoax, then both ESA and NASA are involved in a gigantic hoax an lots and lots of people are involved, there's just too much such stuff:
http://marsanomalyresearch.com/evidence ... ectory.htm