An article published in the journal “Nature” presents a study that describes two possible mega-tsunamis that shook the surface of the planet Mars more than three billion years ago. According to a team led by J. Alexis Palmero Rodriguez of the Planetary Science Institute two meteorites hit Mars a few million years from each other but with similar effects. Perhaps at that time there was an ocean of liquid water and the impacts raised waves up to 120 meters (almost 400 fett) which engulfed large areas of the mainland.