An Ancient Martian Tsunami

A pretty cool result came out of Cornell University this week, showing that Mars was struck by a pair of ancient asteroids that caused massive tsunamis.¬† Not only is it the first evidence of a tsunami event on another world, but it proves that Mars once had a large ocean. The study looked at ancient shorelines between the lowlands and highlands of Mars, where the ocean-land boundary would have been.¬† Two massive impacts, a few million years apart,¬†extended the shorelines and caused turmoil with the Martian climate at the time. “About 3.4 billion years ago, a big meteorite impact triggered...