by Marlowe HOOD PARIS , France (AFP) — Monster tsunamis caused by meteor impacts swept across the northern plains of Mars more than three billion years ago, radically re-sculpting the edges of the Red Planet’s ancient seas, according to a study published Thursday. The findings, based on geological mapping, could provide new clues in the search for life. They also bolster the theory that massive floods 3.4 billion years ago transformed Mars’ northern lowlands into […]