text: Although , this image would bring NASA biliions of dollars if it had been discovered near an ancient civilization .It was only a natural earth formation caused by natural causes , if there was an earthquake would you think aliens made that to . No , exactly because aliens do not exist as we know it. We have no proof that they exist to why conclude that they had made markings on Mars . Just to prove to conspirists like you that aliens didn't leave a marking NASA went to the same spot they took the first images and and retook them again in better weather conditions. They once again found nothing that would relate to a "martain marking".